[clang] Add -fuse-lipo option (PR #121231)

[Steven Wu via cfe-commits]

cachemeifyoucan wrote:

@khyperia Sure, I can help you merge. Code change looks good as I don't see any open review feedback and no objection from adding the option.

Can you please update the PR message to be a better formatted commit message? The squash commit will use that as commit message, and I don't want to rewrite that on your behalf. More specifically, it will read much better if it talks about what is the option added and how to use it, rather formulated around your use case. Just ping me again once you updated the message.

https://github.com/llvm/llvm-project/pull/121231