[libc-commits] [libc] [libc] fix clang-tidy llvm-header-guard warnings (PR #82679)

[Michael Jones via libc-commits]

michaelrj-google wrote:

It seems like all of these are public headers in `include`. I think we had those extra underscores for macro namespacing purposes. I'm not sure if we actually want to remove those, it might be better to remove the check from the include folder.

https://github.com/llvm/llvm-project/pull/82679