af98aadc63
Due to heavy use of using namespace llvm, Reloc is often ambiguous with llvm::Reloc, the relocation model. Previously, this was sometimes disambiguated with macho::Reloc. This ambiguity is even more problematic when using pre-compiled headers, where it's no longer "obvious" whether it should be Reloc or macho::Reloc. Therefore, rename Reloc to Relocation. This is also consistent with lld/ELF, where the type is also named Relocation.