[minor] add osx pkg target to fpm packaging in Makefile

Makefile

@@ -124,6 +124,17 @@ deb-agent: mig-agent
 		--url https://github.com/mozilla/mig --after-install tmp/agent_install.sh \
 		--architecture $(FPMARCH) -v $(BUILDREV) -s dir -t deb .
 
+osxpkg-agent: mig-agent
+	rm -fr tmp
+	$(INSTALL) -D -m 0755 $(BINDIR)/mig-agent-$(BUILDREV) tmp/sbin/mig-agent-$(BUILDENV)
+	$(MKDIR) -p tmp/var/cache/mig
+	echo -en "#!/bin/sh\npkill mig-agent-$(BUILDENV)\nset -e\n[ -h /sbin/mig-agent -o -e /sbin/mig-agent ] && rm /sbin/mig-agent\nln -s /sbin/mig-agent-$(BUILDENV) /sbin/mig-agent\nchmod 500 /sbin/mig-agent-$(BUILDENV)\nchown root:root /sbin/mig-agent-$(BUILDENV)\n/sbin/mig-agent" > tmp/agent_install.sh
+	chmod 0755 tmp/agent_install.sh
+	fpm -C tmp -n mig-agent --license GPL --vendor mozilla --description "Mozilla InvestiGator Agent" \
+		--url https://github.com/mozilla/mig --after-install tmp/agent_install.sh \
+		--architecture $(FPMARCH) -v $(BUILDREV) -s dir -t osxpkg --osxpkg-identifier-prefix org.mozilla.mig .
+
+
 rpm-scheduler: mig-scheduler
 	rm -rf tmp
 	$(INSTALL) -D -m 0755 $(BINDIR)/mig-scheduler tmp/sbin/mig-scheduler