Add a test suite for mergecap (and indirectly capinfos I guess).
This is not exhaustive, but it's a start.
Change-Id: I9442b4c32e31a74b1673961ad6ab50821441de3e
Reviewed-on: https://code.wireshark.org/review/10082
Reviewed-by: Hadriel Kaplan <hadrielk@yahoo.com>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Hadriel Kaplan