[libc] Fix wrapper headers for `at_quick_exit` on GLIBC for c++11#166960

DominikAdamski merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

DominikAdamski:fix_at_quick_exit_libc_wrapperDominikAdamski/llvm-project-upstream:fix_at_quick_exit_libc_wrapperCopy head branch name to clipboard