[llvm] [ObjCopy] Respect requirements of LC_ENCRYPTION_INFO commands (PR #120995)

[Tim Neumann via llvm-commits]

TimNN wrote:

I don't believe this patch is quite correct, see https://github.com/llvm/llvm-project/issues/130472

What this patch seems to do, is push the entire `__TEXT` **segment** back to 16k. 

What it should instead be doing, is push only the first **section** within `__TEXT` back to 16k. 

According to https://github.com/apple-oss-distributions/dyld/blob/main/mach_o/Header.cpp#L867-L873, the load commands must be included in the `__TEXT` **segment**, thus this segment must start at offset zero.

https://github.com/llvm/llvm-project/pull/120995