Reland r351529 "[llvm-objdump][NFC] Improve readability."

`SectionSymbol*` is cast from `void*` to
`std::tuple<uint64_t, StringRef, uint8_t>` in AMDGPUSymbolizer, so it has to
*be* one, not *act like* one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351553 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed