lirc-tools: bump to version 0.9.4d

lirc-tools: bump to version 0.9.4d

Drop 0001-tools-make_rel_symlink.py-can-also-use-python2.patch. Build requires
host-python3 since the previous version bump.

Drop upstream 0002-lircd-Remove-use-of-functions-killed-in-kernel-4.8.0.patch.

Add a patch fixing header guard macro collision with musl libc.

Set HAVE_WORKING_POLL to skip poll(2) run test that is not compatible with
cross compilation.

Add optional dependency on libftdi1.

Cc: Rhys Williams <github@wilberforce.co.nz>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>