test: add regression test for --debug-brk -e 0

Check that `node --debug-brk -e 0` immediately quits.

PR-URL: https://github.com/nodejs/node/pull/3585
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-debug-brk.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const spawnSync = require('child_process').spawnSync;
+
+const args = [`--debug-brk=${common.PORT}`, `-e`, `0`];
+const proc = spawnSync(process.execPath, args, {encoding: 'utf8'});
+assert(/Debugger listening on/.test(proc.stderr));