D26432: Port endl to std::cout/std::cerr or "\n" + flush when necessary. In qt5.15 endl is namespaced.

[David Faure]

dfaure added a reviewer: tcanabrava.

REPOSITORY
  R237 KConfig

REVISION DETAIL
  https://phabricator.kde.org/D26432

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