[libcxx-commits] [libcxx] [libc++] Use -fexperimental-library in the test suite when available (PR #110892)

[Louis Dionne via libcxx-commits]

ldionne wrote:

Turns out this can't work because we use `-nostdlib++`, so `-fexperimental-library` wouldn't result in `-lc++experimental` being added anyways. Also, if we did drop `-nostdlib++` (which we can't), we would need to also specify `-stdlib=libc++` on Linux for `-fexperimental-library` to make a difference.

Dropping.

https://github.com/llvm/llvm-project/pull/110892