sysutils/xen-guest-tools: update 4.16.1 -> 4.20.0
- fixes build issues
PR: 285820
Changes: https://wiki.xenproject.org/wiki/Xen_Project_4.20_Release_Notes
https://wiki.xenproject.org/wiki/Xen_Project_4.19_Release_Notes https://wiki.xenproject.org/wiki/Xen_Project_4.18_Release_Notes https://wiki.xenproject.org/wiki/Xen_Project_4.17_Release_Notes