[renderer] Force-link r_efrag.o for static qwaq

As qwaq doesn't yet do any 3d rendering, it doesn't use efrags and thus
wasn't pulling in the object file, but the various renderers were trying
to access it. And I thought plugin builds were more difficult (I had
forgotten).

libs/video/renderer/r_init.c

@@ -97,4 +97,5 @@ VISIBLE void
 R_Init (void)
 {
 	r_funcs->R_Init ();
+	R_ClearEfrags ();	//FIXME force link of r_efrag.o for qwaq
 }