[compiler-rt] [compiler-rt] [test] Generalize an UNSUPPORTED marking (PR #168858)

[Dan Blackwell via llvm-commits]

DanBlackwell wrote:

These have now been marked unsupported for all platforms here: https://github.com/llvm/llvm-project/pull/168821/files.

https://github.com/llvm/llvm-project/pull/168858