title: Disable minification and uglify in react-native release build for android
body: <p>I have properly working in development environment <code>react-native</code> application. I wanted to test it's performance and released a build, which crashes after the launch.</p>
  
  <pre><code>01-09 20:16:13.644 23215 23251 E ReactNativeJS: Object type 't' not found in schema.
  
  01-09 20:16:13.648 23215 23251 E ReactNativeJS: Module AppRegistry is not a registered callable module (calling runApplication)
  </code></pre>
  
  <p>I couldn't determine the cause of crashing because of minification and uglify of the sources. Could you, please, help me with disabling it, because I already spent plenty of hours on it.</p>
  
  <p><strong>react-native version: 0.49.5</strong></p>