Add flag to compile and link for 64 bit architecture.

syzygy/integration_tests/integration_tests.gyp

 # Copyright 2013 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 125 matching lines @@
           'outputs': [
             '<(PRODUCT_DIR)/integration_tests_clang_dll.dll',
             '<(PRODUCT_DIR)/integration_tests_clang_dll.pdb'
           ],
           'action': [
               '<(python_exe)',
               'make_integration_tests_clang.py',
               '--output-dir=<(PRODUCT_DIR)',
               '--input-files=<(_inputs)',
               '--target-name=integration_tests_clang_dll',
-              '--def-file=integration_tests_clang_dll.def'
+              '--def-file=integration_tests_clang_dll.def',
+              '--target-arch=<(target_arch)'
           ],
         },
       ],
     },
     {
       'target_name': 'integration_tests_dll',
       'type': 'loadable_module',
       'sources': [
         '<@(integration_tests_common_source_files)',
         '<@(integration_tests_other_files)'
@@ skipping 117 matching lines @@
           # Asan agent is compiled without large address spaces to allow a
           # memory optimization on the shadow memory. Agents should run in both
           # modes, thus in the long term, we should remove this.
           # Disable support for large address spaces.
           'LargeAddressAware': 1,
         },
       },
     },
   ],
 }