trunk backport: 
intrin.h: Fixed mm3dnow.h conflict with recent GCC trunk.

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6602 4407c894-4637-0410-b4f5-ada5f102cad1
backport trunk fixes for clang regarding differing dllimport attribute declaration on printf prototypes

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6603 4407c894-4637-0410-b4f5-ada5f102cad1
d3d11.idl: Trivial sync with Wine.

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6604 4407c894-4637-0410-b4f5-ada5f102cad1