D17173: Add error value for job owner dying

[Kai Uwe Broulik]

broulik added a reviewer: dfaure.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D17173

To: davidedmundson, dfaure
Cc: broulik, kde-frameworks-devel, michaelh, ngraham, bruns