Rewrite the negative try-catch tests into a single multi test.

tests/language/src/TryCatch9NegativeTest.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-// Dart test to check that the catching exception class is defined.
-
-main() {
-  try {
-    throw "Hello";
-  } catch (MammaMia e) {
-    // Exception undefined, error at compile time expected. Instead we are
-    // catching all.
-  }
-}