community/firejail: upgrade to 0.9.56 LTS release

  * code based on Firejail version 0.9.56
  * much smaller code base for SUID executable
  * command line options removed:
     --audit, --build, --cgroup, --chroot, --get, --ls, --output,
     --output-stderr, --overlay, --overlay-named, --overlay-tmpfs,
     --overlay-clean, --private-home, --private-bin, --private-etc,
     --private-opt, --private-srv, --put, --rlimit*, --trace, --tracelog,
     --x11*, --xephyr*