Index: wp-admin/includes/upgrade.php
===================================================================
--- wp-admin/includes/upgrade.php	(revision 23179)
+++ wp-admin/includes/upgrade.php	(working copy)
@@ -1207,7 +1207,19 @@
 	if ( $wp_current_db_version < 22422 && $term = get_term_by( 'slug', 'post-format-standard', 'post_format' ) )
 		wp_delete_term( $term->term_id, 'post_format' );
 }
+/**
+ * Execute changes made in WordPress 3.6.
+ *
+ * @since 3.6.0
+ */
+ function upgrade_360() {
+ 	global $wp_current_db_version, $wpdb;
 
+ 	if ( is_main_site() && !defined('DO_NOT_UPGRADE_GLOBAL_TABLES') ) {
+
+ 	}
+ }
+
 /**
  * Execute network level changes
  *