Problem: make memcheck needs Valgrind on Travis CI
Problem: make memcheck needs Valgrind on Travis CI

Solution: add dependency to Valgrind package. Already fixed in Zproject.

twhittock/zyre,zeromq/zyre,zoobab/zyre,twhittock/zyre,twhittock/zyre,hintjens/zyre,zeromq/zyre,twhittock/zyre,hintjens/zyre,zeromq/zyre,zeromq/zyre,zeromq/zyre,twhittock/zyre,hintjens/zyre,zeromq/zyre,zoobab/zyre,zoobab/zyre,zoobab/zyre,hintjens/zyre,hintjens/zyre,zoobab/zyre,zeromq/zyre,zoobab/zyre,zoobab/zyre,hintjens/zyre,zeromq/zyre,twhittock/zyre,hintjens/zyre,hintjens/zyre,zoobab/zyre,twhittock/zyre,twhittock/zyre