lxc: driver: Improve logging when launching emulator
lxc: driver: Improve logging when launching emulator

Log the full command line and a timestamp like we do for QEMU

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