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

[Steven Wu via cfe-commits]

https://github.com/cachemeifyoucan commented:

LGTM in general with a comment in test.

For discussion. Is it better if the option supplies the full path to lipo or just the name? Full path seems to be easy to use, but might deserve a warning if the tool doesn't exist.
If just the name, it might be better to rename the option to something like `-fuse-lipo-program=`. 

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