use kcrash so we get drkonqi to pop up on crashes
Test Plan: - kill -SEGV pidof systemsettings5 brings up drkonqi
Reviewers: mart, bshah, davidedmundson
Reviewed By: bshah, davidedmundson
Subscribers: davidedmundson, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D10175