修改频道 cookie作用域

@@ -207,7 +207,7 @@ window.reMarginFooter('.footer-tab');
 exports.set = function(c) {
 exports.set = function(c) {
     window.setCookie('_Channel', c, {
     window.setCookie('_Channel', c, {
         expires: 365,
         expires: 365,
-        domain: '.m.yohobuy.com'
+        domain: '.yohobuy.com'
     });
     });
 };
 };