[finagle-thriftmux] add explicit dep for bazel
[finagle-thriftmux] add explicit dep for bazel

Problem / Solution

Add the directly used dependencies since bazel will catch the undeclared ones.

JIRA Issues: DPB-12589

Differential Revision: https://phabricator.twitter.biz/D535895

twitter/finagle,twitter/finagle,twitter/finagle,twitter/finagle,twitter/finagle