Only set /ARCH:IA32 on x86 platform

chrome/chrome_installer.gypi

 # 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': {
     'lastchange_path': '../build/util/LASTCHANGE',
     'libpeer_target_type%': 'static_library',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
   },
@@ skipping 277 matching lines @@
             'installer/setup/setup_constants.cc',
             'installer/setup/setup_constants.h',
             'installer/setup/setup_exe_version.rc.version',
             'installer/setup/setup_resource.h',
             'installer/setup/setup_util.cc',
             'installer/setup/setup_util.h',
             'installer/setup/uninstall.cc',
             'installer/setup/uninstall.h',
           ],
           'msvs_settings': {
-            'VCCLCompilerTool': {
-              'EnableEnhancedInstructionSet': '4',  # NoExtensions
-            },
             'VCLinkerTool': {
               'SubSystem': '2',     # Set /SUBSYSTEM:WINDOWS
             },
             'VCManifestTool': {
               'AdditionalManifestFiles': [
                 '$(ProjectDir)\\installer\\setup\\setup.exe.manifest',
               ],
             },
           },
           # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
@@ skipping 39 matching lines @@
               'variables': {
                  'branding_dir': 'app/theme/google_chrome',
                  'branding_dir_100': 'app/theme/default_100_percent/google_chrome',
               },
             }, { # else branding!="Chrome"
               'variables': {
                  'branding_dir': 'app/theme/chromium',
                  'branding_dir_100': 'app/theme/default_100_percent/chromium',
               },
             }],
+            [ 'target_arch=="ia32"', {

[scottmg, 2014/05/16 03:36:30]

extra space after [

[Will Harris, 2014/05/16 03:45:26]

Done.

oh the bad luck of the other gyp file I copied (mini_installer.gypi) having this
formatting! :)

+              'msvs_settings': {
+                'VCCLCompilerTool': {
+                  'EnableEnhancedInstructionSet': '4',  # NoExtensions
+                },
+              },
+            }],
           ],
         },
         {
           'target_name': 'setup_unittests',
           'type': 'executable',
           'dependencies': [
             'installer_util',
             'installer_util_strings',
             'launcher_support',
             '../base/base.gyp:base',
@@ skipping 758 matching lines @@
          'branding_dir_100': 'app/theme/default_100_percent/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': 'app/theme/chromium',
          'branding_dir_100': 'app/theme/default_100_percent/chromium',
       },
     }],
   ],
 }