[llvm] [llvm-size] Fix --totals option for Mach-O files (PR #157904)

[James Henderson via llvm-commits]

jh7370 wrote:

See https://github.com/llvm/llvm-project/issues/86644. I suspect this fixes the issue (so add the relevant annotation to the PR description, please).

https://github.com/llvm/llvm-project/pull/157904