targets/nine: add note about messy header inclusion order

Cc: Axel Davy <axel.davy@ens.fr>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Acked-by: Rob Clark <robclark@freedesktop.org>

src/gallium/targets/d3dadapter9/drm.c

@@ -20,6 +20,7 @@
  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
 
+/* XXX: header order is slightly screwy here */
 #include "loader.h"
 
 #include "adapter9.h"