This update for owncloud-client fixes the following issues:

- Update to upstream version 2.4.2 (boo#1057832)
  * Coming with some bugfixes, Changelog:
    https://owncloud.org/changelog/desktop-client/
  * Fix a problem with older Qt versions
    (https://github.com/owncloud/client/issues/5968)


This update was imported from the openSUSE:Leap:15.0:Update update project.