Add Blink App in Showcase

Summary:
We have made a Companion app for our Blink smart watch in React Native. Currently, It's available only in the Play store. It will be launched in App Store soon. It is under review by apple team with our hardware.

If you want to know more about the company, You can checkout Mashable ( http://mashable.com/2016/09/30/blink-smartwatch-india/#aAdTEyTkfOqW ) , The Next Web ( http://thenextweb.com/gadgets/2016/09/30/the-blink-smartwatch-takes-the-fight-to-google-and-pebble-with-a-custom-os/ ) , Tech in Asia ( https://www.techinasia.com/witworks-blink-%3E%20smartwatch-apple-competitor ) etc.,

Thanks.,
Closes https://github.com/facebook/react-native/pull/11404

Differential Revision: D4354740

Pulled By: hramos

fbshipit-source-id: 18307d43d93fd442d9ff1c283827f91542253ea3

website/src/react-native/showcase.js

@@ -318,7 +318,14 @@ var featured = [
     linkPlayStore: 'https://play.google.com/store/apps/details?id=com.bloomberg.android.plus&hl=en',
     infoLink: 'https://www.techatbloomberg.com/blog/bloomberg-used-react-native-develop-new-consumer-app/',
     infoTitle: 'How Bloomberg Used React Native to Develop its new Consumer App',
-  }
+  },
+	{
+		name: 'Blink',
+		icon: 'https://lh3.googleusercontent.com/QaId7rFtOjAT-2tHVkKB4lebX_w4ujWiO7ZIDe3Hd99TfBmPmiZySbLbVJV65qs0ViM=w300-rw',
+		linkPlayStore: 'https://play.google.com/store/apps/details?id=com.witapp',
+		infoLink: 'https://hashnode.com/post/what-we-learned-after-using-react-native-for-a-year-civdr8zv6058l3853wqud7hqp',
+		infoTitle: 'What we learned after using React Native for a year',
+	}
 ];
 
 /*