[lld] r262590 - [ELF] - add support for relocations against local symbols when producing relocatable output.

[Rafael Espíndola via llvm-commits]

> +        // That can happen if creating relocatable output.
> +        if (Sym.getType() == STT_SECTION)
> +          SymName = Section->getSectionName();

This seems wrong. There no requirement on the symbol name. Why not use
the actual symbol name?