D27106: Attica: Convert license statements to SPDX markers

[Andreas Cord-Landwehr]

cordlandwehr marked 2 inline comments as done.

REPOSITORY
  R235 Attica

REVISION DETAIL
  https://phabricator.kde.org/D27106

To: cordlandwehr
Cc: dfaure, cgiboudeaux, kde-frameworks-devel, LeGast00n, cblack, GB_2, 
michaelh, ngraham, bruns