[clang] [Driver] Add -Wa, options --crel and --allow-experimental-crel (PR #97378)

[Peter Smith via cfe-commits]

https://github.com/smithp35 approved this pull request.

My apologies, I missed this one in my github mail folder.

LGTM, thanks for the update.

https://github.com/llvm/llvm-project/pull/97378