[libcxx-commits] [libcxx] [libc++][test] Mark `UNSUPPORTED` for a test relying on `[[clang::trivial_abi]]` for compilers not supporting it (PR #211736)

[A. Jiang via libcxx-commits]

https://github.com/frederick-vs-ja edited https://github.com/llvm/llvm-project/pull/211736