update install-sx to use czmq 2.2.0
update install-sx to use czmq 2.2.0

BWallet/sx,tuomassiren/libbitcoin-explorer,tuomassiren/libbitcoin-explorer,libmetrocoin/libmetrocoin-explorer,cancoin/libbitcoin-explorer,GroestlCoin/libgroestlcoin-explorer,GroestlCoin/libgroestlcoin-explorer,libtetcoin/libtetcoin-explorer,cancoin/libbitcoin-explorer,GroestlCoin/libgroestlcoin-explorer,BWallet/sx,BWallet/sx,libmetrocoin/libmetrocoin-explorer,libtetcoin/libtetcoin-explorer