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

[Alexey Karyakin via llvm-commits]

quic-akaryaki wrote:

CoverageMapping/mcdc-system-headers.cpp test fails on Windows, which runs clang and filecheck only. That can't be related to this change. I'm not a frequent committer, is it an acceptable practice to merge PR with unrelated failures? I could continue rebasing until it passes, but this seems a waste of resources as each build takes a few hours.

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