specifies not to. Dont build ASTMatchers with Rewriter disabled and
StaticAnalyzer when it's disabled.

Without all those three, the clang binary shrinks (x86_64) from ~36MB
to ~32MB (unstripped).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170135 91177308-0d34-0410-b5e6-96231b3b80d8