daemon: remove minsize directive from hypervisor logrotate files
    
    Commit 6c43149c removed the minsize directive from the qemu logrotate
    file but missed other hypervisors. Remove minsize from the libxl, lxc,
    and uml logrotate files as well.
    
    Signed-off-by: Jim Fehlig <jfehlig@suse.com>
    Reviewed-by: Daniel P. Berrange <berrange@redhat.com>