[lld-macho] Fix branch extension logic compatibility with __objc_stubs (#137913)

Enhance branch extension logic to handle __objc_stubs identically to
__stubs

The branch extension algorithm currently has specific handling for the
`__stubs` section:
1. It ensures all `__stubs` content is directly reachable via branches
from the text section.
2. It calculates the latest text section address that might require
thunks to reach the end of `__stubs`.

The `__objc_stubs` section requires precisely the same handling due to
its similar nature, but this was not implemented.

This commit generalizes the existing logic so it applies consistently to
both the `__stubs` and `__objc_stubs` sections, ensuring correct
reachability and thunk placement for both. Without this change it's
possible to get relocation errors during linking in scenarios where the
`__objc_stubs` section is large enough.

0 files changed, 0 insertions, 0 deletions