[ReactNative] Use ASCII double quotes

Summary:
We mix ASCII double quotes with left and right quotes: https://github.com/facebook/react-native/blob/master/Libraries/CustomComponents/ListView/ListView.js#L13

Let's be consistent.

Libraries/JavaScriptAppEngine/Initialization/source-map-url.js

@@ -17,7 +17,7 @@
   var define = null; // Hack to make it work with our packager
 
 // Copyright 2014 Simon Lydell
-// X11 (“MIT”) Licensed. (See LICENSE.)
+// X11 ("MIT") Licensed. (See LICENSE.)
 
 void (function(root, factory) {
   if (typeof define === "function" && define.amd) {