[libc-commits] [libc] [libc] Add `returns_twice` attribute to `setjmp(3)` (PR #124370)

[Alan Zhao via libc-commits]

alanzhao1 wrote:

> libc/src/setjmp/setjmp_impl.h also needs the attribute applied.

Done

https://github.com/llvm/llvm-project/pull/124370