ssl: allocate regexes with glib

they're stored in a static variable so we only ever need compile them once and
they can just hang around forever

Change-Id: Icf43745ad80f4984443a67af21c979625363fc6f
Ping-Bug: 10474
Reviewed-on: https://code.wireshark.org/review/4139
Reviewed-by: Evan Huus <eapache@gmail.com>