Add Text destructuring to example

Summary:Destructuring of Text component was missing from example
Closes https://github.com/facebook/react-native/pull/5998

Differential Revision: D2948871

fb-gh-sync-id: 83c2c633f768028d28d5e9ba37463021c8dc5eea
shipit-source-id: 83c2c633f768028d28d5e9ba37463021c8dc5eea

website/src/react-native/index.js

@@ -68,7 +68,7 @@ var App = React.createClass({
 {`// Android
 
 var React = require('react-native');
-var { DrawerLayoutAndroid, ProgressBarAndroid } = React;
+var { DrawerLayoutAndroid, ProgressBarAndroid, Text } = React;
 
 var App = React.createClass({
   render: function() {