Build libzmq without documentation
Build libzmq without documentation

* This change reduces build times by half.

lgeiger/zmq-prebuilt,interpretor/zeromq.js,lgeiger/zmq-prebuilt,interpretor/zeromq.js,lgeiger/zmq-prebuilt,lgeiger/zmq-prebuilt,interpretor/zeromq.js,lgeiger/zmq-prebuilt,interpretor/zeromq.js,interpretor/zeromq.js