Reduces BAT section size, bytes: - large binary: 38676872 -> 23262524 (0.60x), - medium binary (trunk clang): 5938004 -> 3213504 (0.54x), - small binary (X86/bolt-address-translation.test): 1436 -> 680 (0.47x). Test Plan: Updated bolt/test/X86/bolt-address-translation.test