Fix 16 linter warnings in Examples/

Summary: Partially fixes #3316 by addressing 16 linter warnings:
 - Strings should be singlequote
 - Missing semicolon

Travis build jobs 1.1 through 1.4 complete successfully. 1.5 fails through what appears to be an unrelated issue on master.
Closes https://github.com/facebook/react-native/pull/3332

Reviewed By: @​svcscm

Differential Revision: D2531718

Pulled By: @javache

fb-gh-sync-id: ca22fbeac5fe3b4f725775a72f21b6dd7a75d94b

Examples/UIExplorer/AppStateIOSExample.js

@@ -40,7 +40,7 @@ var AppStateSubscription = React.createClass({
     AppStateIOS.removeEventListener('memoryWarning', this._handleMemoryWarning);
   },
   _handleMemoryWarning: function() {
-    this.setState({memoryWarnings: this.state.memoryWarnings + 1})
+    this.setState({memoryWarnings: this.state.memoryWarnings + 1});
   },
   _handleAppStateChange: function(appState) {
     var previousAppStates = this.state.previousAppStates.slice();
@@ -92,7 +92,7 @@ exports.examples = [
   },
   {
     title: 'Memory Warnings',
-    description: "In the simulator, hit Shift+Command+M to simulate a memory warning.",
+    description: 'In the simulator, hit Shift+Command+M to simulate a memory warning.',
     render(): ReactElement { return <AppStateSubscription showMemoryWarnings={true} />; }
   },
 ];