[llvm] Don't warn about missing DWO files when converting mach-o files. (PR #152598)

[Jonas Devlieghere via llvm-commits]

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

LGTM. Looks like a lot of the changes in this PR are good but unrelated formatting changes that should land pre or post commit. 

https://github.com/llvm/llvm-project/pull/152598