Fix detection of Xen sysctl version 9
Fix detection of Xen sysctl version 9

In commit 371ddc98, I mistakenly added the check for sysctl
version 9 after setting the hypercall version to 1, which will
fail with

error : xenHypervisorDoV1Op:967 : Unable to issue hypervisor
ioctl 3166208: Function not implemented

This check should be included along with the others that use
hypercall version 2.

crobinso/libvirt,rlaager/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,elmarco/libvirt,agx/libvirt,datto/libvirt,eskultety/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,iam-TJ/libvirt,shugaoye/libvirt,siboulet/libvirt-openvz,trainstack/libvirt,iam-TJ/libvirt,taget/libvirt,zhlcindy/libvirt-1.1.4-maintain,bjzhang/libvirt,jardasgit/libvirt,agx/libvirt,taget/libvirt,novel/fbsd-libvirt,VenkatDatta/libvirt,jeckersb/libvirt,bjzhang/libvirt,zhlcindy/libvirt-1.1.4-maintain,trainstack/libvirt,siboulet/libvirt-openvz,andreabolognani/libvirt,elmarco/libvirt,fabianfreyer/libvirt,trainstack/libvirt,VenkatDatta/libvirt,cbosdo/libvirt,novel/fbsd-libvirt,iam-TJ/libvirt,emaste/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,eskultety/libvirt,libvirt/libvirt,trainstack/libvirt,nertpinx/libvirt,trainstack/libvirt,jfehlig/libvirt,agx/libvirt,zippy2/libvirt,rlaager/libvirt,emaste/libvirt,cbosdo/libvirt,agx/libvirt,jardasgit/libvirt,novel/fbsd-libvirt,datto/libvirt,eskultety/libvirt,VenkatDatta/libvirt,taget/libvirt,taget/libvirt,olafhering/libvirt,eskultety/libvirt,novel/fbsd-libvirt,jfehlig/libvirt,cbosdo/libvirt,zippy2/libvirt,jeckersb/libvirt,olafhering/libvirt,fabianfreyer/libvirt,jeckersb/libvirt,jardasgit/libvirt,andreabolognani/libvirt,taget/libvirt,shugaoye/libvirt,emaste/libvirt,olafhering/libvirt,jeckersb/libvirt,libvirt/libvirt,emaste/libvirt,iam-TJ/libvirt,bjzhang/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,jfehlig/libvirt,nertpinx/libvirt,siboulet/libvirt-openvz,andreabolognani/libvirt,zippy2/libvirt,siboulet/libvirt-openvz,siboulet/libvirt-openvz,eskultety/libvirt,shugaoye/libvirt,trainstack/libvirt,nertpinx/libvirt,cbosdo/libvirt,jeckersb/libvirt,zhlcindy/libvirt-1.1.4-maintain,datto/libvirt,olafhering/libvirt,nertpinx/libvirt,libvirt/libvirt,novel/fbsd-libvirt,bjzhang/libvirt,cbosdo/libvirt,datto/libvirt,jardasgit/libvirt,emaste/libvirt,jfehlig/libvirt,iam-TJ/libvirt,jeckersb/libvirt,elmarco/libvirt,iam-TJ/libvirt,trainstack/libvirt,agx/libvirt,emaste/libvirt,novel/fbsd-libvirt,emaste/libvirt,crobinso/libvirt,andreabolognani/libvirt,novel/fbsd-libvirt,zippy2/libvirt,rlaager/libvirt,crobinso/libvirt,rlaager/libvirt,jeckersb/libvirt,elmarco/libvirt,datto/libvirt,libvirt/libvirt,shugaoye/libvirt,elmarco/libvirt,crobinso/libvirt,iam-TJ/libvirt,nertpinx/libvirt,novel/fbsd-libvirt,bjzhang/libvirt,andreabolognani/libvirt,rlaager/libvirt,fabianfreyer/libvirt