qemu: add the USB devices to the cgroup whitelist
qemu: add the USB devices to the cgroup whitelist

Make sure that the QEmu process within the cgroup can access the device
file for the USB device that has to be connected to the virtual domain.

trainstack/libvirt,rbu/libvirt,agx/libvirt,novel/fbsd-libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,soulxu/libvirt-xuhj,trainstack/libvirt,jeckersb/libvirt,iam-TJ/libvirt,kantai/libvirt-vfork,dumbbell/libvirt,rmarwaha/libvirt1,emaste/libvirt,kantai/libvirt-vfork,dumbbell/libvirt,emaste/libvirt,dumbbell/libvirt,libvirt/libvirt,kantai/libvirt-vfork,rmarwaha/libvirt,nertpinx/libvirt,wiedi/libvirt,andreabolognani/libvirt,nertpinx/libvirt,dumbbell/libvirt,novel/fbsd-libvirt,emaste/libvirt,emaste/libvirt,agx/libvirt,rmarwaha/libvirt,rmarwaha/libvirt,emaste/libvirt,bjzhang/libvirt,olafhering/libvirt,zhlcindy/libvirt-1.1.4-maintain,libvirt/libvirt,foomango/libvirt,trainstack/libvirt,nertpinx/libvirt,rbu/libvirt,olafhering/libvirt,jeckersb/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,novel/fbsd-libvirt,zippy2/libvirt,shugaoye/libvirt,andreabolognani/libvirt,taget/libvirt,rbu/libvirt,trainstack/libvirt,usc-isi/libvirt,danwent/libvirt-ovs,eskultety/libvirt,dumbbell/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,rmarwaha/libvirt1,elmarco/libvirt,wiedi/libvirt,warewolf/libvirt,rmarwaha/libvirt,elmarco/libvirt,bjzhang/libvirt,warewolf/libvirt,iam-TJ/libvirt,olafhering/libvirt,rmarwaha/libvirt1,datto/libvirt,rmarwaha/libvirt1,bjzhang/libvirt,fabianfreyer/libvirt,emaste/libvirt,zippy2/libvirt,olafhering/libvirt,cbosdo/libvirt,zippy2/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,siboulet/libvirt-openvz,siboulet/libvirt-openvz,kantai/libvirt-vfork,novel/fbsd-libvirt,taget/libvirt,nertpinx/libvirt,agx/libvirt,rmarwaha/libvirt1,dumbbell/libvirt,wiedi/libvirt,iam-TJ/libvirt,iam-TJ/libvirt,foomango/libvirt,crobinso/libvirt,jardasgit/libvirt,jfehlig/libvirt,trainstack/libvirt,novel/fbsd-libvirt,jeckersb/libvirt,jardasgit/libvirt,datto/libvirt,agx/libvirt,jardasgit/libvirt,datto/libvirt,jeckersb/libvirt,taget/libvirt,soulxu/libvirt-xuhj,VenkatDatta/libvirt,leilihh/libvirt,iam-TJ/libvirt,kantai/libvirt-vfork,warewolf/libvirt,cbosdo/libvirt,taget/libvirt,trainstack/libvirt,andreabolognani/libvirt,cbosdo/libvirt,danwent/libvirt-ovs,warewolf/libvirt,foomango/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,datto/libvirt,novel/fbsd-libvirt,novel/fbsd-libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,fabianfreyer/libvirt,soulxu/libvirt-xuhj,emaste/libvirt,rmarwaha/libvirt1,danwent/libvirt-ovs,fabianfreyer/libvirt,agx/libvirt,shugaoye/libvirt,elmarco/libvirt,jeckersb/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,zhlcindy/libvirt-1.1.4-maintain,taget/libvirt,rbu/libvirt,rmarwaha/libvirt,cbosdo/libvirt,usc-isi/libvirt,cbosdo/libvirt,crobinso/libvirt,foomango/libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,bjzhang/libvirt,rlaager/libvirt,bjzhang/libvirt,foomango/libvirt,danwent/libvirt-ovs,wiedi/libvirt,usc-isi/libvirt,wiedi/libvirt,libvirt/libvirt,rmarwaha/libvirt,eskultety/libvirt,warewolf/libvirt,danwent/libvirt-ovs,rlaager/libvirt,jfehlig/libvirt,novel/fbsd-libvirt,shugaoye/libvirt,eskultety/libvirt,soulxu/libvirt-xuhj,elmarco/libvirt,jeckersb/libvirt,leilihh/libvirt,warewolf/libvirt,wiedi/libvirt,wiedi/libvirt,rlaager/libvirt,jardasgit/libvirt,elmarco/libvirt,VenkatDatta/libvirt,iam-TJ/libvirt,andreabolognani/libvirt,eskultety/libvirt,VenkatDatta/libvirt,leilihh/libvirt,zippy2/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,rlaager/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,soulxu/libvirt-xuhj,rbu/libvirt,trainstack/libvirt,usc-isi/libvirt,leilihh/libvirt,leilihh/libvirt,libvirt/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,nertpinx/libvirt,shugaoye/libvirt,datto/libvirt,rlaager/libvirt,jfehlig/libvirt,crobinso/libvirt,eskultety/libvirt,leilihh/libvirt,usc-isi/libvirt,jeckersb/libvirt,crobinso/libvirt,jfehlig/libvirt,novel/fbsd-libvirt,siboulet/libvirt-openvz,warewolf/libvirt,iam-TJ/libvirt