xen: Implement virConnectGetSysinfo
xen: Implement virConnectGetSysinfo

virConnectGetSysinfo was never implemented in the legacy xen driver.
This patch provides an implementation based on the qemu driver.

agx/libvirt,datto/libvirt,elmarco/libvirt,zippy2/libvirt,agx/libvirt,cbosdo/libvirt,datto/libvirt,fabianfreyer/libvirt,olafhering/libvirt,rlaager/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,libvirt/libvirt,libvirt/libvirt,elmarco/libvirt,rlaager/libvirt,shugaoye/libvirt,datto/libvirt,nertpinx/libvirt,crobinso/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,VenkatDatta/libvirt,taget/libvirt,zhlcindy/libvirt-1.1.4-maintain,fabianfreyer/libvirt,crobinso/libvirt,eskultety/libvirt,jardasgit/libvirt,shugaoye/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,libvirt/libvirt,cbosdo/libvirt,jfehlig/libvirt,libvirt/libvirt,elmarco/libvirt,eskultety/libvirt,datto/libvirt,zippy2/libvirt,olafhering/libvirt,taget/libvirt,eskultety/libvirt,eskultety/libvirt,olafhering/libvirt,cbosdo/libvirt,taget/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,cbosdo/libvirt,shugaoye/libvirt,crobinso/libvirt,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,crobinso/libvirt,eskultety/libvirt,zhlcindy/libvirt-1.1.4-maintain,andreabolognani/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,shugaoye/libvirt,taget/libvirt,shugaoye/libvirt,rlaager/libvirt,agx/libvirt,andreabolognani/libvirt,datto/libvirt,zhlcindy/libvirt-1.1.4-maintain,zippy2/libvirt,andreabolognani/libvirt,rlaager/libvirt,jardasgit/libvirt,elmarco/libvirt,agx/libvirt,taget/libvirt,olafhering/libvirt,elmarco/libvirt,jfehlig/libvirt,nertpinx/libvirt,jardasgit/libvirt,rlaager/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,zippy2/libvirt,fabianfreyer/libvirt,agx/libvirt