替换fav api

@@ -41,7 +41,7 @@ const getProductBaseAsync = (productId, uid, skn) => {
  * @return { Object } 收藏状态
  */
 const getUserIsFav = (uid, productId) => {
-    return SingleAPI.get('', {
+    return SingleAPI.get('/favorite', {
         method: 'app.favorite.isFavoriteNew',
         id: productId,
         uid: uid,