Add Shell::PrintErr and expose it in the d8 shell as printErr

test/mjsunit/print.js

Index: test/mjsunit/print.js
diff --git a/test/message/arrow-invalid-rest-2.js b/test/mjsunit/print.js
similarity index 54%
copy from test/message/arrow-invalid-rest-2.js
copy to test/mjsunit/print.js
index 3517803d30256b09e78a1aa1f43817e733dc060e..1ec3383e47bb3fac1c37877f46b6caad99836e5f 100644
--- a/test/message/arrow-invalid-rest-2.js
+++ b/test/mjsunit/print.js
@@ -1,8 +1,6 @@
 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-//
 
-var f = (a, ...x = 10) => x;
-f(1, 2, 3, 4, 5);
+assertEquals("function", typeof print, "print should be defined");
+assertEquals("function", typeof printErr, "printErr should be defined");