[clang] [clang] recognize any *-ld.lld variant (PR #117338)

[Brian Cain via cfe-commits]

androm3da wrote:

Can I create a symlink in a lit test (and presumably remove it after the test is done?).

I couldn't think of an effective way to test this, so if reviewers have suggestions, it's much appreciated.

https://github.com/llvm/llvm-project/pull/117338