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

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

OK, I've figured a new way to automate applying fixits. I'ved added it to the commit message. PTAL

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