Rewrite negative const tests into a few multi tests.

tests/language/src/ConstInit4NegativeTest.dart

Index: tests/language/src/ConstInit4NegativeTest.dart
diff --git a/tests/language/src/ConstInit4NegativeTest.dart b/tests/language/src/ConstInit4NegativeTest.dart
deleted file mode 100644
index 69b8abe9a52017bb391dfd103dc19ad7013384f5..0000000000000000000000000000000000000000
--- a/tests/language/src/ConstInit4NegativeTest.dart
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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 program for testing circular initialization errors.
-
-class K {
-  static final n = 1;
-  static final p = const P(n, 0);
-}
-
-class P {
-  const P(this._x, this._y) : _p = K.p;
-  final _x;
-  final _y;
-  final _p;
-}
-
-class ConstInit4NegativeTest {
-  static testMain() {
-    var x = K.p;
-  }
-}
-
-main() {
-  ConstInit4NegativeTest.testMain();
-}