Make akonadi applications non bundle for macOS
QStandardPaths::findExecutable() is not able to find bundles so akonadi
is unable to start. Fix that generating non bundles applications.
The processes are still visible in the macos Dock, but a follow up
patch could hide them.
Reviewers: dvratil, dfaure
Reviewed By: dvratil
Subscribers: vonreth, dvratil, kde-pim
Tags: KDE PIM
Differential Revision: https://phabricator.kde.org/D19982