[libcxx-commits] [libcxx] [libc++] Update the status for lwg-3143 (PR #116971)

[A. Jiang via libcxx-commits]

https://github.com/frederick-vs-ja approved this pull request.

LGTM with CI being green. @ldionne I think the libc++-specific test is already added.

@love1angel I slightly modified the PR description (which will be used as squashed commit message by default). Please double-check it.

https://github.com/llvm/llvm-project/pull/116971