[llvm] [JITLINK]Fix endiannes issue with MachO_ptrauth_noolloc_sections.yaml (PR #167902)

[Lang Hames via llvm-commits]

lhames wrote:

> @lhames , yes, a byte-swap is already happening. However, there's apparently also an endian-dependent _bitfield_ difference that is not handled automatically.

Oh, of course! Thanks for pointing that out.

I want to avoid any external calls and further dependence on `MachOObjectFile` here. Does https://github.com/llvm/llvm-project/pull/168304 solve the issue for you? If so we can go for that instead.

https://github.com/llvm/llvm-project/pull/167902