package/python-pyzmq: enable draft APIs when supported by ZeroMQ

This doesn't introduce a new config flag, instead it just automatically enables
draft support if it's configured in the zeromq package itself.

Signed-off-by: Lionel Flandrin <lionel@svkt.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/python-pyzmq/python-pyzmq.mk

@@ -22,4 +22,8 @@ endef
 
 PYTHON_PYZMQ_POST_PATCH_HOOKS += PYTHON_PYZMQ_PATCH_ZEROMQ_VERSION
 
+ifeq ($(BR2_PACKAGE_ZEROMQ_DRAFTS),y)
+PYTHON_PYZMQ_BUILD_OPTS += --enable-drafts
+endif
+
 $(eval $(python-package))