Add license to libraries.yml

Going to admin/config/search/path/patterns fails with the following error 

Twig_Error_Runtime: An exception has been thrown during the rendering of a template ("Missing license information in library definition for 'jquery.treeTable' in modules/token/token.libraries.yml: it has a remote, but no license.") in "core/modules/system/templates/system-config-form.html.twig" at line 17. in Twig_Template->displayWithErrorHandling()

Seems like we now need to add licenses for remote libraries.