Sema: solve a false positive "depends on itself"

This improves the ABI alignment resolution code.

This commit fully enables the MachO linker code in stage3. Note,
however, that there are still miscompilations in stage3.
9afc4fe0e2Andrew Kelley committed on 5/7/2022, 5:40:57 AMparentdf38dfa
7 files changedLine totals unavailable