Fix one warning

Summary: translucent is a boolean not a stringCloses https://github.com/facebook/react-native/pull/3134

Reviewed By: @​svcscm

Differential Revision: D2495517

Pulled By: @frantic

Examples/UIExplorer/NavigatorIOSColorsExample.js

@@ -66,7 +66,7 @@ var NavigatorIOSColors = React.createClass({
         tintColor="#FFFFFF"
         barTintColor="#183E63"
         titleTextColor="#FFFFFF"
-        translucent="true"
+        translucent={true}
       />
     );
   },