品牌搜索排序优化

@@ -506,8 +506,10 @@ define('yohood', function(require, exports) {
                     return brands;
                 }
 
+                sortBase = sortBase.toLowerCase();
+
                 for (i = 0, len = brands.length; i < len; i++) {
-                    brandName = brands[i].name;
+                    brandName = brands[i].name.toLowerCase();
                     if (brandName.indexOf(sortBase) === 0) {
                         brands = brands.splice(i, 1).concat(brands);
                     }