D17632: Move/copy job: skip stat'ing sources if the destination dir isn't writable

[David Faure]

dfaure added a reviewer: chinmoyr.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D17632

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