Problem: zuuid build fails with gcc 8
Problem: zuuid build fails with gcc 8

Solution: use memcpy instead of strncat, which gets a warning with gcc
8 if the source string gets truncated. In this case it's intentional.

opedroso/czmq,zeromq/czmq,opedroso/czmq,zeromq/czmq,opedroso/czmq,zeromq/czmq,opedroso/czmq,zeromq/czmq,zeromq/czmq,zeromq/czmq,opedroso/czmq,opedroso/czmq,opedroso/czmq,opedroso/czmq,zeromq/czmq,zeromq/czmq,opedroso/czmq