Enable mitigations for CVE-2018-12207

Depending on your hardware, your Citrix Hypervisor or XenServer installation may be affected by the security issue with the identifierCVE-2018-12207. Citrix provides the following hotfixes to mitigate this issue: XS70E075, XS71ECU2024, XS76E012,XS80E008. For more information, seeCitrix Hypervisor...