ninja windows: Support x64 configuration platform

test/rules/src/subdir4/build-asm.gyp

 # Copyright (c) 2009 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This one tests that assembly files ended as .s and .S are compiled.
 
 {
   'target_defaults': {
     'conditions': [
       ['OS=="win"', {
         'defines': ['PLATFORM_WIN'],
       }],
       ['OS=="mac"', {
         'defines': ['PLATFORM_MAC'],
       }],
       ['OS=="linux"', {
         'defines': ['PLATFORM_LINUX'],
       }],
     ],
   },
   'targets': [
     {
       'target_name': 'program4',
       'type': 'executable',
       'sources': [
-        'asm-function.asm',
+        'asm-function.assem',
         'program.c',
       ],
       'conditions': [
         ['OS=="linux" or OS=="mac"', {
           'rules': [
             {
-              'rule_name': 'convert_asm',
-              'extension': 'asm',
+              'rule_name': 'convert_assem',
+              'extension': 'assem',
               'inputs': [],
               'outputs': [
                 '<(SHARED_INTERMEDIATE_DIR)/<(RULE_INPUT_ROOT).S',
               ],
               'action': [
                 'bash', '-c', 'mv <(RULE_INPUT_PATH) <@(_outputs)',
               ],
               'process_outputs_as_sources': 1,
             },
           ],
         }],
       ],
     },
   ],
 }