code: function mapLaunchStoryboardResources (splashScreens, launchStoryboardImagesDir) {
      var platformLaunchStoryboardImages = mapLaunchStoryboardContents(splashScreens, launchStoryboardImagesDir);
      var pathMap = {};
      platformLaunchStoryboardImages.forEach(function (item) {
          if (item.target) {
              pathMap[item.target] = item.src;
          }
      });
      return pathMap;
  }
docs: Returns a dictionary representing the source and destination paths for the launch storyboard images
  that need to be copied.
  
  The resulting return looks like this:
  
  {
  'target-path': 'source-path',
  ...
  }
  
  @param  {Array<Object>} splashScreens         splash screens as defined in config.xml for this platform
  @param  {string} launchStoryboardImagesDir    project-root/Images.xcassets/LaunchStoryboard.imageset/
  @return {Object}