test: add regression test for instanceof

Add regression test for issue
https://github.com/nodejs/node/issues/7592.
The issue was fixed in upstream V8 and this test case was
previously added with a manual cherry pick for v6.x.

Related to: https://github.com/nodejs/node/pull/7638 and
https://github.com/nodejs/node/issues/7592.

PR-URL: https://github.com/nodejs/node/pull/9178
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-instanceof.js

@@ -0,0 +1,10 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+
+
+// Regression test for instanceof, see
+// https://github.com/nodejs/node/issues/7592
+const F = () => {};
+F.prototype = {};
+assert(Object.create(F.prototype) instanceof F);