test: add second argument to assert.throws()

The assert.throws() calls in test-event-emitter-max-listeners.js
should include a constructor or RegExp as a second argument.

PR-URL: https://github.com/nodejs/node/pull/9987


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>