Update ReactExample to use right JS build

For the simulator it will use the packager, but on device it will use the bundled JS build.

examples/ReactExample/ios/ReactExample/AppDelegate.m

@@ -12,9 +12,8 @@
 {
     NSURL *jsCodeLocation;
 
+#if TARGET_OS_SIMULATOR
     /**
-     * Loading JavaScript code - uncomment the one you want.
-     *
      * OPTION 1
      * Load from development server. Start the server from the repository root:
      *
@@ -26,19 +25,21 @@
      * on the same Wi-Fi network.
      */
 
-    jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle?platform=ios"];
+#if DEBUG
+    jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle?platform=ios&dev=true"];
+#else
+    jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle?platform=ios&dev=false"];
+#endif
 
+#else
     /**
      * OPTION 2
-     * Load from pre-bundled file on disk. To re-generate the static bundle
-     * from the root of your project directory, run
-     *
-     * $ react-native bundle --minify
-     *
-     * see http://facebook.github.io/react-native/docs/runningondevice.html
+     * Load from pre-bundled file on disk. The static bundle is automatically
+     * generated by "Bundle React Native code and images" build step.
      */
 
-    //   jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
+    jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
+#endif
 
     RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
                                                         moduleName:@"ReactExample"