[libc-commits] [libc] [libc] `-Wimplicit-fallthrough`, `-Wwrite-strings` and non-GCC warnings (PR #124036)

[Nick Desaulniers via libc-commits]

https://github.com/nickdesaulniers approved this pull request.

Thanks for the patch! Need us to merge this for you?

https://github.com/llvm/llvm-project/pull/124036