[libc-commits] [libc] [libc] build with -Werror (PR #73966)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

32b arm failures: https://lab.llvm.org/buildbot/#/builders/229/builds/20596

aarch64: https://lab.llvm.org/buildbot/#/builders/223/builds/32131

x86: https://lab.llvm.org/buildbot/#/builders/163/builds/48002

https://github.com/llvm/llvm-project/pull/73966