mix.exs: Explicitly list `goldrush` and `lager` as dependencies

They are not dependencies of the CLI, but dependencies of rabbit_common.
Unfortunately, mix(1) doesn't embed them in the final escripts. In fact,
it doesn't embed any dependencies of rabbit_common, but the CLI probably
doesn't call the code which would trigger a crash.

deps/rabbitmq_cli/mix.exs

@@ -136,6 +136,18 @@ defmodule RabbitMQCtl.MixfileBase do
             compile: false,
             override: true
           },
+          {
+            :goldrush,
+            path: Path.join(deps_dir, "goldrush"),
+            compile: false,
+            override: true
+          },
+          {
+            :lager,
+            path: Path.join(deps_dir, "lager"),
+            compile: false,
+            override: true
+          },
           {
             :amqp_client,
             path: Path.join(deps_dir, "amqp_client"),