[llvm] llvm-objdump: ensure a MachO symbol isn't STAB before looking up secion (PR #86667)

[Adrian Prantl via llvm-commits]

adrian-prantl wrote:

Looks like the discussion fizzled out. The tests pass, so I'll go ahead and merge this patch for now if no-one objects.

https://github.com/llvm/llvm-project/pull/86667