update file in bbb plugin

plugin/bbb/update.php

@@ -0,0 +1,14 @@
+<?php
+/* For licensing terms, see /license.txt */
+/**
+ * Update the plugin.
+ *
+ * @package chamilo.plugin.bigbluebutton
+ */
+require_once __DIR__.'/config.php';
+
+if (!api_is_platform_admin()) {
+    die('You must have admin permissions to install plugins');
+}
+
+BBBPlugin::create()->update();