[clang] [clang-tools-extra] [compiler-rt] [lld] [llvm] [NFC] Fix tests with invalid RUN directives (PR #179668)

[James Henderson via cfe-commits]

https://github.com/jh7370 approved this pull request.

Formally: llvm-objcopy and obj2yaml tests look good to me, as do those that are pure fixes of the RUN prefix without other changes.

https://github.com/llvm/llvm-project/pull/179668