[llvm] Support target names with dots in more utilities (PR #65812)

[Dan McGregor via llvm-commits]

dankm wrote:

No _good_ particular reason. I got hung up on the formatting issues then ran out of steam, and busy with $job. I just ran clang-format on this change and it came up clean.

And now that I've done that the only reason I have left is I'm unable to merge my own changes. Would you mind, @jh7370?

https://github.com/llvm/llvm-project/pull/65812