Move out gtphub to its own subdir

Change-Id: I707d5e9b775179e732d281ce3d245de83d648eea
diff --git a/debian/copyright b/debian/copyright
index 695d768..5d883b9 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -104,9 +104,9 @@
            src/gprs/gprs_sndcp_vty.c
            src/gprs/gprs_sndcp_xid.c
            src/gprs/gprs_subscriber.c
-           src/gprs/gtphub.c
-           src/gprs/gtphub_main.c
-           src/gprs/gtphub_vty.c
+           src/gtphub/gtphub.c
+           src/gtphub/gtphub_main.c
+           src/gtphub/gtphub_vty.c
            src/gprs/sgsn_auth.c
            src/gprs/sgsn_cdr.c
            src/gprs/sgsn_ctrl.c
@@ -140,8 +140,8 @@
  You should have received a copy of the GNU Affero General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-Files:     src/gprs/gtphub_ares.c
-           src/gprs/gtphub_sock.c
+Files:     src/gtphub/gtphub_ares.c
+           src/gtphub/gtphub_sock.c
            tests/gbproxy/gbproxy_test.c
 Copyright: 2013 Jacob Erlbeck <jerlbeck@sysmocom.de>
            2013 sysmocom s.f.m.c. GmbH