security/spass{-qt5}: Update to 3.2

• Introduce security/spass-qt5 as a slave port that contains only the GUI version which was added with the 3.1 release.

• Use the latest commit d38d173 to make use of the WITH_GUI boolean flag that enables the GUI/CLI-only build.

Changelog since 3.0:

• Minor tweaks for the CLI version
• Additional Qt5 GUI version

PR: 238621
Submitted by: Thomas Merkel <tm@NetBSD.org> (initial patch)
Reviewed by: mat (portmgr, to determine if FLAVORS can be used or not)
Differential Revision: https://reviews.freebsd.org/D21084