D26301: Remove endl in qDebug it's already add \n at the end + port endl + flush when necessary

[Aleix Pol Gonzalez]

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

REPOSITORY
  R294 KBookmarks

BRANCH
  port_endl_qt5.15 (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D26301

To: mlaurent, dfaure, apol
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns