This update for perl-XML-Twig fixes the following issues:

- Security fix [bsc#1008644, CVE-2016-9180]
* Setting expand_external_ents to 0 or -1 currently doesn't work
as expected; To completely turn off expanding external entities
use no_xxe.
* Update documentation for XML::Twig to mention problems with
expand_external_ents and add information about new no_xxe argument

This update was imported from the SUSE:SLE-15:Update update project.