[clang] [clang-cl] Fix for __FUNCTION__ in c++. (PR #66120)

[Zahira Ammarguellat via cfe-commits]

zahiraam wrote:

> I wanted to make some minor naming suggestions, and I used the GitHub "edit this file" feature for the first time to commit them as new commits to your branch. I've never done this before, so I don't really know how it works, but clang-format isn't available, so now I've messed up the formatting...
> 
> I _think_ you should be able to pull the suggested changes down, reformat the affected lines, commit that, push an updated commit, and then I can stamp that? I apologize if this isn't straightforward, it's my first time trying the tools.

No worries. I think it is synced up now. Thanks.

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