add known user (#927)

README.md

@@ -441,6 +441,7 @@ Welcome to register the company name in this issue: https://github.com/alibaba/a
 ![360金融](static/360jinrong.png)
 ![安居客](static/anjuke.jpg)
 ![qunar](static/qunar.png)
+![ctrip](static/ctrip.png)
 ### Derivative Projects
 
 * [Bistoury: A project that integrates Arthas](https://github.com/qunarcorp/bistoury)

README_CN.md

@@ -435,7 +435,7 @@ $ classloader
 ![360金融](static/360jinrong.png)
 ![安居客](static/anjuke.jpg)
 ![qunar](static/qunar.png)
-
+![ctrip](static/ctrip.png)
 ### 洐生项目
 
 * [Bistoury: 一个集成了Arthas的项目](https://github.com/qunarcorp/bistoury)