submodule(ready-to-run): Bump spike/nemu ref in ready-to-run

* spike commit: ad9bf364c2067493a6e1c7fdd48db934be9dd81c
* spike config: CPU=XIANGSHAN

Including:
    fix(dbltrp): align logic of sdt with xiangshan

* NEMU commit: 0b75a4555a4cac16247a5fe3659f52ea900729e8
* NEMU configs:
    * riscv64-xs-ref_defconfig
    * riscv64-dual-xs-ref_defconfig

Including:
    * fix(dbltrp): fix sdt/dte interation logic
    * fix(henvcfg): fix read value for CSR henvcfg.
    * fix(hvip): fix the MASK of HVIP for LCOFI bit.
    * submodule(ready-to-run): bump spike ref (#686)
    * fix(dbltrp): fix difftest read logic of xstatus.SDT (#685)
    * fix(watchpoint): support set watchpoint on every 64 bits for vreg.
    * feat(watchpoint): add watchpoint of vector and floatponit
    * submodule(ready-to-run): bump spike ref in ready-to-run
    * config: enable Zimop, Zcmop and Zcb.