xen: security update
This update of XEN fixed multiple security flaws that could be exploited
by local attackers to cause a Denial of Service or potentially escalate
privileges.
Additionally, several other upstream changes were backported.
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Submitted by
Marcus Meissner (msmeissn)
Fixed bugs
bnc#757537
VUL-0: xen: CVE-2012-0217 PV guest escalation
bnc#757970
VUL-1: xen: guest denial of service on syscall GPF generation
bnc#764077
VUL-0: xen: XSA-9: denial of service on older AMD systems
