wined3d: CreateFakeGLContxt/ReleaseFakeGLContext doesn't need ENTER_GL/LEAVE_GL and they are making GDI calls.

The removal of ENTER_GL from the fake context code, requires the
addition of ENTER_GL/LEAVE_GL to FillGLCaps which was protected by the
fake context code before.

advapi32: In ConvertStringSecurityDescriptorToSecurityDescriptor "AU" should be checked before "A" (with testcase).