[NPANDAY-578] return AssemblyFoldersEx to non-portable list

We typically need these to be packaged and used, which won't happen for system
dependencies - therefore only the framework ones should be a system path. When
this option is enabled, it is recommended that you copy them to a Maven
repository in the final dialog.

git-svn-id: https://svn.apache.org/repos/asf/incubator/npanday/trunk@1453697 13f79535-47bb-0310-9956-ffa450edef68