[libcxx-commits] [libcxx] [libc++] FreeBSD CI: Adds `<signal.h>` to `check_assertion.h` (PR #78863)

[Konstantin Varlamov via libcxx-commits]

https://github.com/var-const approved this pull request.

Thanks a lot for fixing this!

https://github.com/llvm/llvm-project/pull/78863