title: passing runtime arguments to erlang when running rebar eunit
body: <p>In my startup script, I am starting erlang with:</p>
  
  <pre><code>erl -args_file vm.args
  </code></pre>
  
  <p>Currently, while trying to run unit tests with <code>rebar eunit</code> is there a way for me to pass custom runtime arguments such as the -args_file option to the erlang process that rebar kicks off?  I have searched docs high and low to no avail...  </p>
  
  <p>I appreciate the help.</p>