backend-drm: Print whenever a view will reach the renderer region

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>

libweston/backend-drm/state-propose.c

@@ -944,6 +944,9 @@ drm_output_propose_state(struct weston_output *output_base,
 				      &clipped_view);
 
 		pixman_region32_fini(&clipped_view);
+
+		drm_debug(b, "\t\t\t\t[view] view %p will be placed "
+			     "on the renderer\n", ev);
 	}
 
 	pixman_region32_fini(&renderer_region);