[llvm] [clang-cl] Fix value of __FUNCTION__ and __FUNC__ in MSVC mode for c++. (PR #66120)

[Aaron Ballman via llvm-commits]

AaronBallman wrote:

> > I've reverted the changes in [9243b1b](https://github.com/llvm/llvm-project/commit/9243b1bfdbf4c8b8f3f8c8e45b57f784311adaac), but you should handle the revert yourself next time because you have commit privileges and it's possible the person requesting a revert does not. (If you can't do the revert immediately for whatever reason, it's fine to tell people something along the lines of "I'll revert by unless someone else is able to revert it sooner.")
> 
> Sorry. Didn't realize that (I would have expected that the person would let me know). Thanks.

No worries! We could probably make the policy documentation more clear about that.

https://github.com/llvm/llvm-project/pull/66120