Tell Portscout to ignore the KDE4 version of graphics/kooka
The release situation is a bit weird here: git master is KF5-based,
but has had no release. It has version 0.90 set in the CMakeLists.txt,
and some distro's package it as 0.90. We're going to stick with the
0.61 version number (plus git tag) until there's an actual KF5 release.