[mips] Remove XFAIL.

Triple x86_64 has been added to the command line, so this test doesn't fail
on mips anymore.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@192219 91177308-0d34-0410-b5e6-96231b3b80d8
Abstract out parts of thunk emission code, add support for simple thunks when using -cxx-abi microsoft

Reviewed at http://llvm-reviews.chandlerc.com/D1787

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@192220 91177308-0d34-0410-b5e6-96231b3b80d8
Remove documentation of removed -ast-dump-xml flag.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@192221 91177308-0d34-0410-b5e6-96231b3b80d8
Suggest people use -Xclang not -cc1 when passing options to the frontend.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@192222 91177308-0d34-0410-b5e6-96231b3b80d8