[Driver] Revert D139717 and add -Xparser/-Xcompiler instead

Some macOS projects use -Xparser even if it leads to a
-Wunused-command-line-argument warning. It doesn't justify adding a broad Joined
`-X` (IgnoredGCCCompat) as GCC doesn't really support these arbitrary `-X`
options.

Note: `-Xcompiler foo` is a GNU libtool option, not a driver option.
It is misused by some ChromeOS packages (but not by Gentoo).
Keep it for a while.

It seems that GCC < 4.6 reports g++: unrecognized option '-Xfoo' but exit with 0.
GCC >= 4.6 reports g++: error: unrecognized option '-Xfoo' and exits with 1.
It never supports -Xcompiler or -Xparser, so `IgnoredGCCCompat` is not justified.

Differential Revision: https://reviews.llvm.org/D140224