D6974: Make unittest independent from the location of the executable.

[Marco Martin]

mart accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R127 KWayland

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D6974

To: dfaure, graesslin, mart
Cc: plasma-devel, #frameworks, leezu, ZrenBot, progwolff, lesliezhai, 
ali-mohamed, jensreuterberg, abetts, eliasp, sebas, apol, mart, hein, lukas