zmq: add support for TIPC transport

A ZeroMQ application can opt for TIPC based sockets
using the TIPC port name format:
zmq_bind(sb, "tipc://{type,lower,upper}");
zmq_connect(sc, "tipc://{type,inst}");

'type' is the service ID, and 'lower/upper' can be
used for service partitioning or basic load
balancing.

ZeroMQ TIPC transport requires a kernel >= 3.8
(nonblocking connect support for TIPC).

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
zmq: add TIPC transport tests

The tests are identical to the TCP ones, only the
addressing is changed.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Merge pull request #110 from Hugne/tipc_support

Tipc support