[llvm-branch-commits] [libcxx] release/19.x: [libc++] Fix name of is_always_lock_free test which was never being run (#106077) (PR #110838)

[Louis Dionne via llvm-branch-commits]

ldionne wrote:

Impact: basically none, this adds test coverage we should always have had.

https://github.com/llvm/llvm-project/pull/110838