D21313: Create specific directory for kdebugsettings categories file

[Laurent Montel]

mlaurent added a reviewer: dfaure.

REPOSITORY
  R240 Extra CMake Modules

REVISION DETAIL
  https://phabricator.kde.org/D21313

To: mlaurent, dfaure
Cc: kde-frameworks-devel, kde-buildsystem, bencreasy, michaelh, ngraham, bruns