I am not a Debian s390x porter, per se, and I don't know much about Debian package maintaining. But if you want to create your own virtual s390x machine for testing purposes, perhaps the following web page will be helpful to you:
http://users.wowway.com/~zlinuxman/hercules.htm -- .''`. Stephen Powell : :' : `. `'` `- -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org