D5195: don't add the autotests dir when test building is disabled

[Chusslove Illich]

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

REPOSITORY
  R249 KI18n

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D5195

To: sitter, ilic
Cc: #frameworks