Fix double modulo bug by temporary disabling calling to C (fix and reenabling it will follow later)…

tests/language/double_modulo_test.dart

+// Copyright (c) 2013, 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 optimization of modulo operator on Double.
+
+main() {
+  double k = -0.33333;
+  double firstResPos = doMod(k, 1.0);
+  double firstResNeg = doMod(k, -1.0);
+  for (int i = 0; i < 5000; i++) {
+    Expect.equals(firstResPos, doMod(k, 1.0));
+    Expect.equals(firstResNeg, doMod(k, -1.0));
+  }
+}
+
+doMod(a, b) => a % b;