Revert: "Use Clang's __has_* macros in Compiler.h to test for features"

This reverts r185831 and 185833.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185841 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed