[libcxx-commits] [libcxx] [libcxx][test] Change UNSUPPORTED to XFAIL in lit tests on z/OS (PR #81513)

[Konstantin Varlamov via libcxx-commits]

var-const wrote:

@abhina-sree I renamed the patch slightly to make it clear that it only applies to z/OS. Hope you don't mind -- feel free to rephrase, but IMO without that clarification, the title is too general.

https://github.com/llvm/llvm-project/pull/81513