fix copyright date

src/main/res/menu/user_info_menu.xml

@@ -2,8 +2,8 @@
 <!--
   Nextcloud Android client application
 
-  Copyright (C) 2017 Andy Scherzinger
-  Copyright (C) 2017 Nextcloud
+  Copyright (C) 2017-2018 Andy Scherzinger
+  Copyright (C) 2017-2018 Nextcloud
 
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE