Fixing Makefile to support Zookeeper on upgraded rc cluster.
Fixing Makefile to support Zookeeper on upgraded rc cluster.

anirajk/RAMCloud,jblomer/ramcloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,anirajk/RAMCloud,jblomer/ramcloud,jblomer/ramcloud,anirajk/RAMCloud,jblomer/ramcloud,anirajk/RAMCloud,SMatsushi/RAMCloud,jblomer/ramcloud,utah-scs/RAMCloud,anirajk/RAMCloud,anirajk/RAMCloud,utah-scs/RAMCloud,SMatsushi/RAMCloud,SMatsushi/RAMCloud,jblomer/ramcloud,utah-scs/RAMCloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,SMatsushi/RAMCloud,utah-scs/RAMCloud