[libcxx-commits] [libcxx] [libc++] Properly define _LIBCPP_HAS_NO_UNICODE in __config_site (PR #95138)

[Mark de Wever via libcxx-commits]

mordante wrote:

>From a quick look this looks like broken tests due to `TEST_HAS_NO_UNICODE` was never set. I'll create a commit with fixes.

https://github.com/llvm/llvm-project/pull/95138