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

runtime/vm/debugger_api_impl_test.cc

Index: runtime/vm/debugger_api_impl_test.cc
diff --git a/runtime/vm/debugger_api_impl_test.cc b/runtime/vm/debugger_api_impl_test.cc
index dfb85635da4eef48843db4e20e93fe2354a79941..d0907f12c6496d30e6b6fbd31468c835aa32c995 100644
--- a/runtime/vm/debugger_api_impl_test.cc
+++ b/runtime/vm/debugger_api_impl_test.cc
@@ -1,10 +1,9 @@
-// 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.
 
 #include "include/dart_debugger_api.h"
-
-#include "vm/assert.h"
+#include "platform/assert.h"
 #include "vm/unit_test.h"
 
 namespace dart {