Update dependency bazelbuild/bazel-skylib to latest version

Included changes:

  - dc080e95161964a1ff841bfd0b871a1123c027a8 Prettify failure message of asserts.set_equals. (#263)
  - 16de038c484145363340eeaf0e97a0c9889a931b Add missing bzl_library for analysis_test.bzl (#262)
  - d62d6f52d5a3937b423d9aa755c8f60ea5e04dd5 rm last usage of --experimental_build_setting_api (#260)
  - 07922b040c3d8b8b0317e3dc687db625dd3e3cd4 Stop depending on rules_pkg through the federation. (#259)
  - 2a44ef8ec8c419abd49852b873209de3ab742af7 Add `new_sets` as a dep of `sets` bzl_library (#253)
  - 8f3151fb4a91d5f2ae4cad5901ea72fe30a2aba0 copy_file: Add parameter to allow symlinks (#252)
  - d35e8d7bc6ad7a3a53e9a1d2ec8d3a904cc54ff7 Create Gazelle language for Starlark (#251)
  - b10f2cb0fc013218f727de8c631d6dd1cfc078ea Remove --experimental_build_setting_api usage (#249)
  - ec2170289f3845a40945e9fbdfed03bddad13a90 Add myself to codeowners for rules (#256)
  - 3b666f525dfc645eea2bc4832796f8d6a07a997a Address lint errors (#254)
  - 560d7b2359aecb066d81041cb532b82d7354561b Add license and copyright notice (#245)
  - feb52960ebd8797421b599194ad6ac7da3fc7600 Fix diff_test when filepath includes external (#241)
  - 9935e0f820692f5f38e3b00c64ccbbff30cebe11 Depend on bzl_library, not on individual bzl files (#244)
  - 2d0c6512910452f2c8660466ed0dcefb642adea3 Update visibility of files (#243)
  - dfcfe825005ffba4a7c15cd9ddac737d040d2506 Fix type parsing errors on "always true" conditions. (#239)
  - 2d620ba1f8284695181fa092ec4064724ea99a9a Fix the comment to match the code. (#238)
  - 6970e21d290ceaa36502d0c94533b26e5ec18c0b Create a helper rule for selecting a file from outputs of...
  - add8e42934d1bf63ecf27f5439574383e74ef8fc Run buildifier over the directory. (#235)
  - 0a934a997d141ced0d8781f988da07ebe2101df0 Fix buildifier issue failing on CI. (#234)
  - 2d4c9528e0f453b5950eeaeac11d8d09f5a504d4 Add absolute path tests for Windows (#230)
  - 1c5ed0706a8e2f73116e128184be64a99e66e83d Migrate code for the flag --incompatible_disable_depset_i...
  - e583e822a0bb99e04cd4a2b9a3baf5e1088a214d Remove old_sets.bzl (#231)
  - 4b25373d12887f5add565197c4a163e9f1d9b716 Remove flag --incompatible_remap_main_repo (#227)
  - 327d61b5eaa15c11a868a1f7f3f97cdf07d31c58 Migrate for --incompatible_use_platforms_repo_for_constra...
  - 9f63e1a8d46d49ec44c007a2d43ba2f3bec84f7a make select_tests resilient to default configuration diff...
  - 930b3527b91213940f57289bb581a8b64d3c31ee Remove links to maprules (#213)
  - 734652aa5e1585646e90dfa19add0d57a954ce56 Remove unnecesssary license BUILD comment (#209)
  - e59b620b392a8ebbcf25879fc3fde52b4dc77535 Fix execute bit on empty_test.sh (#206)
  - cff8af42e9dd84bb7e4a9a89732c7c34fde7a75d Remove genfiles_dir retrieval method (#203)
  - 47c6eb15c6b16421b4a16be29bc1e42b80dcd559 Fix to 1.0.1 - add missing .bzl files (#201)
  - 376680d27667c09f4ff1021fa3fc442e02819031 Expose target_under_test's bin and genfiles path (#202)
  - 0e9da0dd08b763a5e3eece10a5abba5df6b8e46f fix distribution so that we get the right dependencies lo...
  - e5cf5398cd3e01d5552ed1056aafc06f92adb374 Update version and changelog in prep for 1.0.0 release (#...
  - f1475299afd41815c78c3768253468ea622669f3 Avoid some repetition in _make_analysis_test (#197)
  - 720f59405d95c5052a8e16762a8fd2a4d50baded Pass `fragments` through to analysis tests rule construct...
  - d8387f7bd0ef68f2939bf8898c73aa33d11af1a1 load rules thorugh maybe so we can simultaneous updates (...
  - 3154dbbc41da755a345afd8545e3152726e17c16 Add types.is_set() to test whether an arbitrary object is...
  - 58068fe0cc28d8d5e0115bf0e7d80189628f35db Delete maprule. Fix Buildifier lint errors. (#192)
  - 90ea6feaf33e8ef12fdac9981b2efccc6a25c727 Update "Getting Started" instructions to 0.9.0 release. (...
  - 3f7b196d2a57194ef025e32509e5966d73c5ea15 Update selects documentation. (#170)
  - ab87410a8bbfbe7306e21365d56461a20f5f4154 Use rules_pkg to make the skylib tarball for a release. (...
  - c5bd012f3119a4da13d523d47c36719ec288a86f add aiuto as code owner. direct changes to distribution/ ...
  - 6214b316195d2e37414814a2a84bb5e12e7362a7 Scope buildkite badge to the master branch (#186)
  - 143c602a1356512436e4830865f18be452119a99 Add jin to codeowners (#175)
  - f130d7c388e6beeb77309ba4e421c8f783b91739 Comply with the standards of the Bazel federation (#182)
  - d2cf1cc2bcd1e879743faf5216c4887b994705af `print`->`fail` and suppress the warning in another case....
  - a6c72f2b390d4c574fbf75c2c325d926c4c48cd6 Make config_setting_group visibility aware (#168)
  - 2b38b2f8bd4b8603d610cfc651fcbb299498147f fix formatting problem (#169)
  - 10851c2c5bd528a518af23b2a23f2efe4427f139 Give BuildSettingInfo's value field a description (#167)
  - 21ee269a55222df15f49f0cec3bca997de292a66 Create new stardoc target for common_settings.bzl (#166)
  - c102f5d414bd2e019e2ac6104abd0ca1e244cd04 Get docs working again. (#165)
  - b113ed5d05ccddee3093bb157b9b02ab963c1c32 Create common build settings (#154)
  - 6a6a509f367ca0446e75c6f881719f5da2a55a26 selects.bzl: Add config_setting_group for config_setting ...
  - 446fd595bf1bb85768d885ab3a92dc8f80b29475 README.md: Fix typo in project name (#161)
  - efd3bfd0f9dea52ecf765f97a4708a89483943f7 Add some comments to unittest_test.sh (#159)
  - 202db59eccd13c5c9a98b4c905ed300eb2785e10 Make sets.bzl point to new_sets.bzl instead of old_sets.b...
  - 5c80706f70186507a262ef756fff80b2fde743e9 Fix for --incompatible_no_support_tools_in_action_inputs ...
  - 9aa308e1ef0f0f0543e3d58f3b3c5488c087c8c1 Fix repository for compatibility with --incompatible_no_s...
  - bf8a55b6687fc93c003d07505d886bbd1a7ff39a run_binary: runs an executable as an action (#153)
  - c5852220719bc29fdb256612adc4adde26b30b6c New rules: native_binary and native_test (#152)
  - 6126842e3db2ec4986752f6dfc0860ca922997f1 copy_file: expose the copying logic (#151)
  - 6bf64439752b2a98418a731ff21eb9d58ed5631c write_file: support different line endings (#150)
  - 67ecd632735a45267da051003d7eaf8d8ca1b998 Minor formatting changes plus doc updates (#147)
  - 84a12d1084bd156b4c0ed3f313299d2afdb5fe43 Fix a number of misc issues to allow google usage of baze...
  - 67215655bf6ce349b2b88ae4f5945a706f8ce959 Use TEST_SRCDIR for shell tests (#145)
  - ffad33e9bfc60bdfa98292ca655a4e7035792046 Pass through an attribute arguments to `analysistest.make...
  - f80abf6578612d4b5dda3dd50337d22c8ac7b37d Fix typo (#142)
  - 31b8ea5ea16f7bf9e81eb18a9f4cbd9b0a70b4d7 Add licenses() to all BUILD files. (#141)
  - be3b1fc838386bdbea39d9750ea4411294870575 diff_test: add rule and tests (#136)
  - 184c66e563babf7f6396c0d6236e75ed3a7bfcc1 Fix installation instructions (#135)
  - cc6a6c3ed4298d2a9fd5791b8d3546dee4f86d3f Fix broken link to new_sets doc page (#120)
  - 2b1c4610c3d26f74c3ca4a2074cb1115535dcaf0 Reformat with buildifier --warnings=all (#138)
  - 084758ff75463750f6c2476348ed9442e7860275 Regenerate docs + remove maprule.md (#137)
  - 4c26bf475c5cacade5367c92ef2dab5abe912112 Windows: fix tests for native test wrapper (#129)
  - 98ef48ebb2248e24184712ba3189de241707cc8a maprule: move functionality to maprule_util.bzl (#132)
  - 3721d32c14d3639ff94320c780a60a6e658fb033 maprule: hide it, not ready for public use. (#133)
  - aeefb6531aa30f678f0d8d40c6b5bf095408cdb5 Accept kwargs in dicts.add() (#130)
  - bdbedc18326673cca7b0ceab1b88719a35be3030 maprule: add basic integration test (#131)
  - b2dc5c0e63efdcfaddc0b4a4ecd8b0f8bea07978 e2e tests: make them run on Windows (#121)
  - 2d1669ed882652e5fc695bb99c77442a9273ff56 write_file: add rule and tests (#122)
  - db27394846f9beda839c10fa1e37a00a2a193235 copy_file: add rule and tests (#123)
  - f26e8ac863e5fc764189853723cd3e707fc039a9 Use //... to mean "all packages" (#128)
  - b2b4471332abdbf8979c89ca5e2cbb4f3a2bdc0f run buildifier 0.22.0 (#125)
  - bb56986cd4b446f6ec26fdb259c320ca95677303 Fix Buildifier version (#124)
  - 1b28145983091cbe8639d2816fb03ccb3950bbc9 maprule: use ctx.resolve_tools (#117)
  - 9630853eebaee22d8799f97ab58f648a1b82d02d add documentation pages for rules/ and lib/ (#119)
  - e171ec16d89afe28d09d29837ce523aa10aebdc6 CI updates. (#118)
  - a2ec47917b52199de11b737e4197e9fd040b4bfd fix a number of warnings found by Starlark analyzer (#114)
  - a35b13a1c9a3d43e81fcfaca42155c53d4b31cb7 analysistest API for retrieval of actions registered by t...
  - a5655124382ccbf7214456468cec6b7ec2e39c41 CI simplification/improvements for buildifier (#113)
  - baaef76aaa16bd1230de949d620e6a40fe26cba6 Add analysis_test rule
  - 6bb8994a03e9e47b9394888d82444427c5f6149e Add analysis-test test framework (#110)
  - aa3147f0de51c645aefcf82e523a4ccd0f85cb3c Create CODEOWNERS (#103)
  - 7a536d396bb1995d6eec660a675f45cef89b0f12 Add basic shell testing for unittest.bzl (#108)
  - 6741f733227dc68137512161a5ce6fcf283e3f58 Add `types.is_depset`. (#105)
  - 4b67f5ff384d1d2b0925299e0c1919d36b4ecaab Add rules to the test_deps target. (#102)
  - 97dc99e8a6f3cf216e8b4eb95b830ef43118cabb Fix example load directive. (#101)
  - d3d5ba7d05c60ecf91ecd8c9db30d4c7e2381947 Some doc fixes (#100)
  - f5e50bc53c52708abd29919a66bac307c6dc2e07 Add a build_test rule. (#97)
  - 9b85311ab47548ec051171213a1b3b4b3b3c9dc8 Enable tests on Windows (#99)
  (And 71 more changes)

BAZEL_SKYLIB_VERSION_REV_ID: dc080e95161964a1ff841bfd0b871a1123c027a8
Change-Id: I1814ae3eaf4056f9f71be03247731558244304e4

third_party/bazel_skylib.bzl

@@ -0,0 +1,19 @@
+# Copyright 2019 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# This file is autogenerated by copybara, please do not edit.
+
+skylib_version = "dc080e95161964a1ff841bfd0b871a1123c027a8"
+skylib_sha256 = "bc26446a7fa9fbeacdd4aa14e7e2c03439e852348a87821eb2c8cfffd4b03fc2"