use osmo-ggsn.git, no longer openggsn

Change-Id: I73a0acfa6e38b16c4da33097329a8f15b29aa938
diff --git a/3G+2G.deps b/3G+2G.deps
index b905d4b..74cc48c 100644
--- a/3G+2G.deps
+++ b/3G+2G.deps
@@ -5,7 +5,7 @@
 libosmo-sccp	libosmo-netif
 libsmpp34
 libasn1c
-openggsn	libosmocore
+osmo-ggsn	libosmocore
 osmo-iuh	libosmo-sccp libasn1c
 osmo-hlr	libosmo-abis
 osmo-mgw	libosmo-netif