RelocVisitor::visit(): Set hasError in the default path.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173565 91177308-0d34-0410-b5e6-96231b3b80d8
Object/RelocVisitor: Add minimal support, R_PPC64_ADDR32, for ppc64.

It fixes llvm-dwarfdump for ppc64-elf.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173566 91177308-0d34-0410-b5e6-96231b3b80d8
Object/RelocVisitor: Add minimal support, R_MIPS_32, for mips.

It fixes llvm-dwarfdump for mips and mipsel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173567 91177308-0d34-0410-b5e6-96231b3b80d8