[compiler-rt] Check if LLD is built when checking if lto_supported (PR #92752)

[Jan Voung via llvm-commits]

jvoung wrote:

Thanks Vitaly! Ok I can check the number of test before and after and post them.

Would you mind helping land this if it's ok? I don't yet have commit access.

https://github.com/llvm/llvm-project/pull/92752