[llvm] [libc-utils] disable target_compile_features (PR #121883)

[Louis Dionne via llvm-commits]

ldionne wrote:

In the meantime, it seems like this PR as-is just silences that error by disabling whatever's breaking in your configuration, but it's very likely not how we'll fix the root cause of your issue. Closing for now to avoid keeping stales in the PR queue.

https://github.com/llvm/llvm-project/pull/121883