comment for create-plt make target

Author: Vlad Ionescu

Makefile

@@ -66,6 +66,7 @@ dialyze: $(BEAM_TARGETS) $(BASIC_PLT)
 	$(ERL_EBIN) -eval \
 		"rabbit_dialyzer:halt_with_code(rabbit_dialyzer:dialyze_files(\"$(BASIC_PLT)\", \"$(BEAM_TARGETS)\"))."
 
+# rabbit.plt is used by rabbitmq-erlang-client's dialyze make target
 create-plt: $(RABBIT_PLT)
 
 $(RABBIT_PLT): $(BEAM_TARGETS) $(BASIC_PLT)