Copyright for memtool source package in Jammy

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-name: memtool
Upstream-Contact: oss-tools@pengutronix.de

Files: *
Copyright: (C) 2015 Pengutronix, Sascha Hauer 
           (C) 2018 Pengutronix, Uwe Kleine-König 
License: GPL-2

Files: debian/*
Copyright: (C) 2015, Uwe Kleine-König 
License: GPL-2

License: GPL-2
  Redistributable and modifiable under the terms of the GPL version 2
  as published by the Free Software Foundation.
  The full text of the GPL version 2 can be found in
  /usr/share/common-licenses/GPL-2 on Debian systems.