Makefile: make the monolithic jar PHONY, so it builds everytime for the           jar target
Makefile: make the monolithic jar PHONY, so it builds everytime for the
          jar target

joekiller/logstash-kafka,tinglinux/logstash-kafka,joekiller/logstash-kafka,opentable/logstash-kafka,Aloomaio/logstash-kafka,Aloomaio/logstash-kafka,tinglinux/logstash-kafka,opentable/logstash-kafka