[llvm] [llvm-objcopy] Apply encryptable offset to first segment, not section (PR #130517)

[Daniel Rodríguez Troitiño via llvm-commits]

drodriguez wrote:

Sorry James. I though you were the other commenter in the other thread. My bad.

@glandium do you mind checking if this was what was affecting your binary from #120995 ? For some reason the `fileoff` being a page into the binary was not crashing anything for me, but the `dyld_info` checker obviously find it incorrect.

https://github.com/llvm/llvm-project/pull/130517