[libcxx-commits] [libcxx] [libcxx][test] Correct syntax of lit directives in some tests (PR #146886)

[David Spickett via libcxx-commits]

DavidSpickett wrote:

`using-built-library-before-llvm-19` may no longer be needed, and the other xfails may become UPASS but let's see what CI says about it.

https://github.com/llvm/llvm-project/pull/146886