[Driver] Add -Wa,--reloc-section-sym= to control section symbol conversion (#183472)
Wire the llvm-mc --reloc-section-sym={all,internal,none} option through
the clang driver (-Wa,--reloc-section-sym=) and cc1as
(--reloc-section-sym=). The option is only valid for ELF targets.
GNU Assembler will add the option as well.