Add API to set load flags used by UnpackingJSBundleLoader

Reviewed By: tadeuzagallo

Differential Revision: D3557667

fbshipit-source-id: 5665667185cda10415210efce83685c3e3abee92

ReactAndroid/src/main/java/com/facebook/react/cxxbridge/JSBundleLoader.java

@@ -104,6 +104,7 @@ public abstract class JSBundleLoader {
       .setDestinationPath(new File(context.getFilesDir(), "optimized-bundle"))
       .checkAndUnpackFile(bundleName + ".meta", "bundle.meta")
       .unpackFile(bundleName, "bundle.js")
+      .setLoadFlags(UnpackingJSBundleLoader.UNPACKED_JS_SOURCE)
       .build();
   }