Add a .arcconfig file to use arcanist
Summary: Signed-off-by: Gustavo Carneiro <carneirodelphi@hotmail.com>
Reviewers: patrickelectric, andreagenor, tcanabrava
Reviewed By: patrickelectric, tcanabrava
Subscribers: tcanabrava, dakon, kde-utils-devel
Differential Revision: https://phabricator.kde.org/D28607