Use proper package version

Use actual application version instead of hardcoded "0".

Change-Id: I8711b9d819454d810291d57b97119d9fe4a47f8e
diff --git a/src/hnbgw.c b/src/hnbgw.c
index 752fc0f..5f5c311 100644
--- a/src/hnbgw.c
+++ b/src/hnbgw.c
@@ -326,7 +326,7 @@
 
 static struct vty_app_info vty_info = {
 	.name		= "OsmoHNBGW",
-	.version	= "0",
+	.version	= PACKAGE_VERSION,
 	.go_parent_cb	= hnbgw_vty_go_parent,
 };