Update os-github.md

Author: jeterlee

android/open_source/os-github.md

@@ -10,13 +10,14 @@
 
 
 ### 2、开源Github（组织）
+* [**Google**](https://github.com/google)
+* [**Google Samples**](https://github.com/googlesamples)
 * [**Tencent**](https://github.com/Tencent)
 * [**Alibaba**](https://github.com/alibaba)
 * [**Facebook**](https://github.com/facebook)
 * [**Square**](https://github.com/square)
 * [**bilibili**](https://github.com/Bilibili)
 * [The Apache Software Foundation](https://github.com/apache)
-* [Google](https://github.com/google)
 * [极光开发者](https://github.com/jpush)
 * [Qihoo 360](https://github.com/Qihoo360)
 * [MobDevGroup](https://github.com/MobDevGroup/)