项目背景：手动link的安卓App
1.下载 react-native-code-push
npm install –save react-native-code-push
2.在android/settings.gradle文件下新增：
include ‘:app’, ‘:react-native-code-push’
project(‘:react-native-code-push’).projectDir = new File(rootProject.projectDir, ‘../node_modules/react-native-code-push/android/app’)
