qemu: Fix build breaker on printf directive
qemu: Fix build breaker on printf directive

%zu for size_t not %lu

zippy2/libvirt,taget/libvirt,datto/libvirt,jardasgit/libvirt,agx/libvirt,rlaager/libvirt,libvirt/libvirt,eskultety/libvirt,jardasgit/libvirt,datto/libvirt,eskultety/libvirt,olafhering/libvirt,andreabolognani/libvirt,elmarco/libvirt,libvirt/libvirt,jfehlig/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,crobinso/libvirt,elmarco/libvirt,shugaoye/libvirt,andreabolognani/libvirt,agx/libvirt,datto/libvirt,jfehlig/libvirt,agx/libvirt,fabianfreyer/libvirt,elmarco/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,libvirt/libvirt,crobinso/libvirt,shugaoye/libvirt,shugaoye/libvirt,agx/libvirt,crobinso/libvirt,jfehlig/libvirt,agx/libvirt,nertpinx/libvirt,olafhering/libvirt,nertpinx/libvirt,jardasgit/libvirt,datto/libvirt,eskultety/libvirt,fabianfreyer/libvirt,rlaager/libvirt,taget/libvirt,rlaager/libvirt,eskultety/libvirt,taget/libvirt,elmarco/libvirt,shugaoye/libvirt,taget/libvirt,nertpinx/libvirt,olafhering/libvirt,olafhering/libvirt,zippy2/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,andreabolognani/libvirt,zippy2/libvirt,taget/libvirt,zippy2/libvirt,nertpinx/libvirt,rlaager/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,libvirt/libvirt,rlaager/libvirt,crobinso/libvirt,elmarco/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jfehlig/libvirt,nertpinx/libvirt,eskultety/libvirt,datto/libvirt