doc(Readme): add ci result link for native branch

doc(Readme): add ci result link for native branch
diff --git a/README.md b/README.md
index 09a8406..482716b 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ## RocketMQ Client Go
 [![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
-[![TravisCI](https://travis-ci.org/apache/rocketmq-client-go.svg)](https://travis-ci.org/apache/rocketmq-client-go)
+[![TravisCI](https://travis-ci.org/apache/rocketmq-client-go.svg)](https://travis-ci.org/apache/rocketmq-client-go.svg?branch=native)
 
 ( The alpha version of Apache RocketMQ Go in Pure Go has been released, Welcome have a try! [native version](https://github.com/apache/rocketmq-client-go/tree/native) )