GTPv2: Update a value string.

Change-Id: If38d9e86fff6e142804b3d206f5afed2c6fec8bd
Reviewed-on: https://code.wireshark.org/review/32991
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>

epan/dissectors/packet-gtpv2.c

@@ -4953,6 +4953,8 @@ static const value_string gtpv2_container_type_vals[] = {
     {1, "UTRAN transparent container"},
     {2, "BSS container"},
     {3, "E-UTRAN transparent container"},
+    {4, "NBIFOM Container"},
+    {5, "EN-DC Container"},
     {0, NULL}
 };