[clang-tools-extra] [llvm] [clang] [llvm-objcopy] Check for missing argument values (PR #70710)

[James Henderson via cfe-commits]

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

Are there any options that expect 2+ values (i.e. something that would give a different response to "expected 1 value(s)"? If so, it might be worth switching one of the cases for that one, just for additional bonus coverage without additional test complexity.

Otherwise, LGTM.

https://github.com/llvm/llvm-project/pull/70710