zeromq-scala-binding: Add missing constants to ZMQ.Poller
zeromq-scala-binding: Add missing constants to ZMQ.Poller

Signed-off-by: Karim Osman <0df4ab017385e9aa3324400d725f59ea31c57132@iki.fi>

valotrading/zeromq-scala-binding,valotrading/zeromq-scala-binding