add /debian package support

Change-Id: I985805aea0e48fe70619de8b81206098e4e37613
diff --git a/debian/osmo-hnbgw.install b/debian/osmo-hnbgw.install
new file mode 100644
index 0000000..e230915
--- /dev/null
+++ b/debian/osmo-hnbgw.install
@@ -0,0 +1,2 @@
+usr/bin/osmo-hnbgw
+usr/share/doc/osmo-iuh/examples/osmo-hnbgw.cfg