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

runtime/vm/disassembler_ia32.cc

-// 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 "vm/disassembler.h"
+
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
-#include "vm/disassembler.h"
-
 #include "vm/allocation.h"
 #include "vm/code_index_table.h"
 #include "vm/heap.h"
 #include "vm/os.h"
 #include "vm/stub_code.h"
 #include "vm/utils.h"
 
 namespace dart {
 
 // Tables used for decoding of x86 instructions.
@@ skipping 1556 matching lines @@
                                   human_buffer,
                                   sizeof(human_buffer),
                                   pc);
     pc += instruction_length;
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32