update Makefiles and symlinks

examples/video-stream/main.c

@@ -22,6 +22,7 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
       mg_http_serve_dir(c, ev_data, &opts);
     }
   }
+  (void) fn_data;
 }
 
 // The image stream is simulated by sending MJPEG frames specified by the