r300g: report GL1.5, enable cap bits for OQ and shadow.

Its not like it works well on 1.3 so may as well reach for greater
heights.

Signed-off-by: Dave Airlie <airlied@redhat.com>

src/gallium/drivers/r300/r300_screen.c

@@ -101,11 +101,9 @@ static int r300_get_param(struct pipe_screen* pscreen, int param)
         case PIPE_CAP_MAX_RENDER_TARGETS:
             return 4;
         case PIPE_CAP_OCCLUSION_QUERY:
-            /* IN THEORY */
-            return 0;
+            return 1;
         case PIPE_CAP_TEXTURE_SHADOW_MAP:
-            /* IN THEORY */
-            return 0;
+            return 1;
         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
             if (r300screen->caps->is_r500) {
                 /* 13 == 4096x4096 */