Making type_tag_for_datatype consistent with its declared subject from Attr.td. Also updated the related testcase.

Reviewed by Dmitri Gribenko.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195675 91177308-0d34-0410-b5e6-96231b3b80d8
Make the integrated assembler the default for cygwin/mingw too.

The integrated assembler was already the default for win32. It is now able
to handle a clang bootstrap on mingw, so make it the default.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195676 91177308-0d34-0410-b5e6-96231b3b80d8