D8387: Workaround incorrectly returned EEXIST instead of EPERM regression introduced by libsmbclient 4.7

[David Edmundson]

davidedmundson accepted this revision.

REPOSITORY
  R320 KIO Extras

REVISION DETAIL
  https://phabricator.kde.org/D8387

To: madcatx, ngraham, davidedmundson, elvisangelaccio, #frameworks
Cc: cfeck, rdieter, graesslin, z3ntu