add wpcom suffix

ixion/style.css

@@ -4,7 +4,7 @@ Theme URI: http://wordpress.com/themes/ixion/
 Author: Automattic
 Author URI: http://wordpress.com/themes/
 Description: A theme for non-profits, organizations, and schools.
-Version: 1.1.5
+Version: 1.1.5-wpcom
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 Text Domain: ixion