Revert "Revert "Revert "Revert "Revert "Revert "[lld-macho] Implement...

Revert "Revert "Revert "Revert "Revert "Revert "[lld-macho] Implement -dependency_info (partially - more opcodes needed)""""""

This reverts commit 4876ba5b.

Third-attemp relanding D98559, new change:
  - explicitly cast enum to underlying type to avoid ambiguity (workaround to clang's bug).