Add failing uncaughtException test

FIXME

test/simple/test-exception-handler2.js

@@ -0,0 +1,11 @@
+process.on('uncaughtException', function (err) {
+  console.log('Caught exception: ' + err);
+});
+
+setTimeout(function () {
+  console.log('This will still run.');
+}, 500);
+
+// Intentionally cause an exception, but don't catch it.
+nonexistentFunc();
+console.log('This will not run.');