Recommended update for owncloud-client

This update for owncloud-client fixes the following issues:

- Update to upstream version 2.4.2 (boo#1057832)
* Coming with some bugfixes, Changelog:
* Fix a problem with older Qt versions

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

Fixed bugs
Version update for ownCloud Client to 2.4.2
Selected Binaries
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