add minification in the build

dist/editor/system/extensions/ext-locale/grid/en.js

@@ -1,17 +1 @@
-System.register([], function (exports) {
-  'use strict';
-  return {
-    execute: function () {
-
-      var en = exports('default', {
-        name: 'View Grid',
-        buttons: [
-          {
-            title: 'Show/Hide Grid'
-          }
-        ]
-      });
-
-    }
-  };
-});
+System.register([],(function(e){"use strict";return{execute:function(){e("default",{name:"View Grid",buttons:[{title:"Show/Hide Grid"}]})}}}));

dist/editor/system/extensions/ext-locale/grid/zh_CN.js

@@ -1,17 +1 @@
-System.register([], function (exports) {
-  'use strict';
-  return {
-    execute: function () {
-
-      var zhCN = exports('default', {
-        name: '网格视图',
-        buttons: [
-          {
-            title: '显示/隐藏网格'
-          }
-        ]
-      });
-
-    }
-  };
-});
+System.register([],(function(t){"use strict";return{execute:function(){t("default",{name:"网格视图",buttons:[{title:"显示/隐藏网格"}]})}}}));