[kcms/krdb] Fix krdb executable
Summary:
krdb is mostly a library used by some KCMs.
It also exists as an executable script that works by invoking kcminit
style which in turn runs the krdb code.
This broke after a port that involved a rename.
Test Plan:
krdb on a distro that doesn't have old files
It ran instead of giving a warning
Reviewers: Plasma, apol
Reviewed By: apol
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D25081