fix several lint warnings

Summary: fix some ling warnings from several files
Closes https://github.com/facebook/react-native/pull/4450

Reviewed By: svcscm

Differential Revision: D2707606

Pulled By: mkonicek

fb-gh-sync-id: 410ccacf061ac7b0f6e44d1a5e4621a9d1d606fc

Libraries/Components/MapView/MapView.js

@@ -232,7 +232,7 @@ var MapView = React.createClass({
        * @platform ios
        */
       image: Image.propTypes.source,
-      
+
       /**
        * annotation id
        */