[llvm] [llvm-objcopy] Add --remove-symbol-prefix (PR #79415)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

> I'm going to merge this as no objection is raised for three days. Happy to address any further comments in follow-up CLs.

In general, I don't think this is within LLVM policy. @MaskRay explicitly said his approval was conditional on my approval, so landing it without my approval or a revised approval from @MaskRay would effectively mean landing this without any approval at all. I've been a) off sick and b) have a high load of reviews that need to be tackled, so responding to updates takes time (even if I hadn't been off sick).

https://github.com/llvm/llvm-project/pull/79415