fixes to libcmt stripper to correctly strip x64 objects

base/allocator/allocator.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'jemalloc_dir': '../../third_party/jemalloc/chromium',
     'tcmalloc_dir': '../../third_party/tcmalloc/chromium',
     'use_vtable_verify%': 0,
   },
@@ skipping 503 matching lines @@
                 'prep_libc.py',
               ],
               'outputs': [
                 '<(SHARED_INTERMEDIATE_DIR)/allocator/libcmt.lib',
               ],
               'action': [
                 'python',
                 'prep_libc.py',
                 '$(VCInstallDir)lib',
                 '<(SHARED_INTERMEDIATE_DIR)/allocator',
+                '<(target_arch)',
               ],
             },
           ],
         },
         {
           'target_name': 'allocator_unittests',
           'type': 'executable',
           'dependencies': [
             'allocator',
             'allocator_extension_thunks',
@@ skipping 133 matching lines @@
           'sources': [
             'type_profiler_map_unittests.cc',
             '<(tcmalloc_dir)/src/gperftools/type_profiler_map.h',
             '<(tcmalloc_dir)/src/type_profiler_map.cc',
           ],
         },
       ],
     }],
   ],
 }