added support for windows file paths

[ribsey]

I encountered a library with windows file paths and some of them had even the current working directory during the build added in front of the file path, like this:
D:\\stack\\targets\\ST\\STM32F0/HW-Abstraction.c:122
or this:
D:\\some\\other\\path\\D:\\stack\\targets\\ST\\STM32F0/HW-Abstraction.c:122

So with the new regex and the backslash to slash replacement, these paths get parsed as well.

[HBehrens]

Thank you for providing some more real-world data into the mix and providing a matching implementation, @ribsey 💪

@noahp I haven't look at the code in a while, do you know if this part does have tests already? With all of this regex shenanigans, I am worried we will (one day) introduce a regression during the attempt to add more features. If yes, adding the examples provided would be awesome!