add definition for IPV4/IPV6 types

Pick up change from Samba:

    commit 49e0dc7ad0f3c29df20badacc4294f1adc375aaf
    Author: Matthieu Patou <mat@matws.net>
    Date:   Fri Oct 25 23:11:37 2013 -0700

    pidl-wireshark: add definition for IPV4/IPV6 types

Change-Id: I514f855370c1d9355ffc6ff9b31f8aedd70b9122
Reviewed-on: https://code.wireshark.org/review/5096
Reviewed-by: Guy Harris <guy@alum.mit.edu>