qemu: Do not fail virConnectCompareCPU if host CPU is not known
qemu: Do not fail virConnectCompareCPU if host CPU is not known

When host CPU could not be properly detected, virConnectCompareCPU will
just report that any CPU is incompatible with host CPU instead of
failing.

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