package/php-zmq: add upstream php8 compatibility patches

These patches are necessary for compiling against php8. These patches also
retain the ability to compile against PHP7.2 and should be removed during the
next version bump.

Signed-off-by: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>