[llvm] Fix getting section info in large mach-o files. (PR #165940)

[Peter Rong via llvm-commits]

DataCorrupted wrote:

LTGM.

I wonder if we can relax MachO's standard by saying that "32-bit section offsets can exceed 4G but must be ordered for 64-bit offset reconstruction". This way we can use little change (like this PR) to alleviate the hard restriction.


https://github.com/llvm/llvm-project/pull/165940