Revert r187537 "clang-cl: add more options"

It broke the "phase1 - sanity" buildbot. Reverting until
we can figure out what's going on.

And Eric says it broke all current Mac builds actually.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187640 91177308-0d34-0410-b5e6-96231b3b80d8