D8612: Fix CMake Error in generators/spectre/CMakeLists.txt

[Nathaniel Graham]

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

REPOSITORY
  R223 Okular

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8612

To: rkflx, #okular, ngraham
Cc: aacid