Move assert.h/assert.cc from runtime/vm to runtime/platform

runtime/platform/assert.cc

Index: runtime/platform/assert.cc
diff --git a/runtime/vm/assert.cc b/runtime/platform/assert.cc
similarity index 91%
rename from runtime/vm/assert.cc
rename to runtime/platform/assert.cc
index ecda4d12b8fe744f529564a656a0f6d93d97a2a0..2f3e145e47b31018ab9cefc124b2597f1a506544 100644
--- a/runtime/vm/assert.cc
+++ b/runtime/platform/assert.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
@@ -6,7 +6,8 @@
 #include <sstream>
 #include <string>
 
-#include "vm/assert.h"
+#include "platform/assert.h"
+#include "vm/globals.h"
 
 namespace dart {