Copyright for termdebug source package in Bionic

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Termdebug
Source: http://os.ghalkes.nl/dist/

Files: *
Copyright: Copyright (c) 2010,2013 G.P. Halkes
License: GPL-3

Files: debian/*
Copyright: Copyright (c) 2015 Lennart Weller 
License: GPL-3

License: GPL-3
 On Debian systems, the complete text of the GNU General Public License
 version 3 can be found in `/usr/share/common-licenses/GPL-3'.