On platforms where launcher shortcuts are supported (Windows and Linux), if an additional launcher is explicitly requested not to have a shortcut, this request is not saved in the .jpackage.xml when building an app image.

This issue manifests only when this app image is used to build a package through the "--app-image" option and a shortcut is requested for the main launcher. In this case, the shortcut should be created only for the main launcher, but shortcuts are created for all launchers instead.

The issue was uncovered while enhancing AddLShortcutTest (JDK-8334238).