修复模板加价购和赠品模板请求接口返回的bug，需要返回模板的html代码，不能渲染

Code Review By Rock Zhang

-{{> cart/chose-panel}}

@@ -193,11 +193,12 @@ class IndexController extends AbstractAction
 
     /*
      * 获取购物车加价购商品数据模板
+     * 需要返回模板的html代码，不能渲染
      */
     public function giftinfoTplAction()
     {
         if ($this->isAjax()) {
-            $this->_view->display('gift-tpl');
+            echo file_get_contents($this->_view->getScriptPath() . '/../partials/cart/chose-panel.phtml');
         }
     }
 
@@ -208,11 +209,11 @@ class IndexController extends AbstractAction
     {
         $result = array();
 
-//        if ($this->isAjax()) {
+        if ($this->isAjax()) {
             $skn = $this->get('skn', null);
             $promotionId = $this->get('promotionId', null);
             $result = CartModel::giftProductData($skn, $promotionId);
-//        }
+        }
 
         if (empty($result)) {
             echo ' ';