Update for Win7

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6385 4407c894-4637-0410-b4f5-ada5f102cad1
Update for win7

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6386 4407c894-4637-0410-b4f5-ada5f102cad1
d2d1_1helper.h: Added some missing helpers.

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6387 4407c894-4637-0410-b4f5-ada5f102cad1
d2d1effects.h: Added some missing declarations.

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6388 4407c894-4637-0410-b4f5-ada5f102cad1