title: React native packager fails on node 6.5
body: <p>This was working previously. But since I upgraded from node 4.6 to 6.5, When I do an <code>npm start</code>, I end up with below error</p>
  
  <pre><code>Failed to build DependencyGraph: @providesModule naming collision:
    Duplicate module name: String.prototype.es6
    Paths: ...../node_modules/react-native/packager/react-packager/src/Resolver/polyfills/String.prototype.es6.js collides with ...../app/MallJell/nd/react-native/packager/react-packager/src/Resolver/polyfills/String.prototype.es6.js
  
  This error is caused by a @providesModule declaration with the same name across two different files.
  Error: @providesModule naming collision:
    Duplicate module name: String.prototype.es6
    Paths: ....../react-native/packager/react-packager/src/Resolver/polyfills/String.prototype.es6.js collides with ..../react-packager/src/Resolver/polyfills/String.prototype.es6.js
  
  This error is caused by a @providesModule declaration with the same name across two different files.
      at HasteMap._updateHasteMap (..../node_modules/react-native/packager/react-packager/src/node-haste/DependencyGraph/HasteMap.js:155:13)
      at module.getName.then.name (.....node_modules/react-native/packager/react-packager/src/node-haste/DependencyGraph/HasteMap.js:115:31)
  </code></pre>