3GPP: upgrade 2G/3G NAS dissector to v12.7.0 and NAS EPS dissector to v12.6.0

Change-Id: I1e5bc5d28cb956b333c302b1cb18335b59d096a8
Reviewed-on: https://code.wireshark.org/review/5621
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>