Add Debian packaging information

Change-Id: Id5044b1835190edc948952d207a5196a18669eb1
diff --git a/debian/copyright b/debian/copyright
new file mode 100644
index 0000000..8af2d2e
--- /dev/null
+++ b/debian/copyright
@@ -0,0 +1,25 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: osmo-remsim
+Source: http://cgit.osmocom.org/osmo-remsim/
+
+Files: *
+Copyright: 2018-2019 Harald Welte <laforge@gnumonks.org>
+License: GPL-2+
+
+
+License: GPL-2+
+ This package is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 2 of the License, or
+ (at your option) any later version.
+ .
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+ .
+ You should have received a copy of the GNU General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ .
+ On Debian systems, the complete text of the GNU General
+ Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".