I have updated the generate-lib-file target in build-thirdparty.xml to run the ComponentRefGraphLicenseVisitor:

 <target name="generate-lib-file"
 description="generate libraries.ent and thirdparty license info"
 depends="synchronize">
 <gen-lib-file filename="${generatedLibrariesFiles}" />
 <visit-componentref-graph
 componentVisitor="org.jboss.ant.util.graph.ComponentRefGraphLicenseVisitor" />
 </target>

This pulls down the license files for all active license types to thirdparty/licenses and builds a thirdparty/licenses/thirdparty-licenses.xml xref that is similar to what we had before.

Additional xrefs that would be useful are:
- artifact-users.xml : for every single artificat in thirdparty, list the components that reference it.
- component-artifacts.xml : for every component, provide a complete list of its artifacts including imported artifacts.