Force cowlib master

Emqtt was fetching the "wrong" version.

Author: lhoguin

deps/rabbit/Makefile

@@ -128,7 +128,7 @@ endef
 
 LOCAL_DEPS = sasl os_mon inets compiler public_key crypto ssl syntax_tools xmerl
 
-BUILD_DEPS = rabbitmq_cli
+BUILD_DEPS = rabbitmq_cli cowlib
 DEPS = ranch rabbit_common amqp10_common rabbitmq_prelaunch ra sysmon_handler stdout_formatter recon redbug observer_cli osiris syslog systemd seshat horus khepri khepri_mnesia_migration cuttlefish gen_batch_server
 TEST_DEPS = rabbitmq_ct_helpers rabbitmq_ct_client_helpers meck proper amqp_client rabbitmq_amqp_client rabbitmq_amqp1_0