Upcoming changes need GnuTLS >= 3.0.2. Require GnuTLS 3.2 (or newer) for
licensing reasons. The Debian control file still mentions 3.2.14 because
older packages linked with a GMP library that was not GPLv2+ compatible.
RHEL6 only has 2.12.23, but is already unsupported anyway.
Change-Id: I024b2a734ebb16b73a624bb2435c254e963d8b7d
Reviewed-on: https://code.wireshark.org/review/30832
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>