This update for virtualbox fixes the following issues:

- The version has been updated from 5.1.8 to 5.1.12. Upstream fixed various
functional and security issues.
- Multiple security issues have been fixed that could cause DoS and possibly
privilege escalation
(CVE-2016-5501,CVE-2016-5538,CVE-2016-5605,CVE-2016-5608,CVE-2016-5610,
CVE-2016-5611,CVE-2016-561313, boo#1005621)
- A security warning regarding USB passthru has been added. It will be shown
only the first time virtualbox is started. (bnc#1018340)
- Reverted a previously introduced user interface scaling change, because it
caused problems
(https://forums.opensuse.org/showthread.php/521520-VirtualBox-interface-scaling,
bsc#1014694)