win: bring back xp/2k3 support

Chrome still runs on Windows XP, so there is no reason that iojs
couldn't.

PR: #512
Reviewed-by: Ben Noordhuis <info@bnoordhuis.nl>

Author: piscisaureus

common.gypi

@@ -141,20 +141,28 @@
       },
       'VCLinkerTool': {
         'conditions': [
+          ['target_arch=="ia32"', {
+            'TargetMachine' : 1, # /MACHINE:X86
+            'target_conditions': [
+              ['_type=="executable"', {
+                'AdditionalOptions': [ '/SubSystem:Console,"5.01"' ],
+              }],
+            ],
+          }],
           ['target_arch=="x64"', {
-            'TargetMachine' : 17 # /MACHINE:X64
+            'TargetMachine' : 17, # /MACHINE:AMD64
+            'target_conditions': [
+              ['_type=="executable"', {
+                'AdditionalOptions': [ '/SubSystem:Console,"5.02"' ],
+              }],
+            ],
           }],
         ],
         'GenerateDebugInformation': 'true',
         'RandomizedBaseAddress': 2, # enable ASLR
         'DataExecutionPrevention': 2, # enable DEP
         'AllowIsolation': 'true',
         'SuppressStartupBanner': 'true',
-        'target_conditions': [
-          ['_type=="executable"', {
-            'SubSystem': 1, # console executable
-          }],
-        ],
       },
     },
     'msvs_disabled_warnings': [4351, 4355, 4800],

node.gyp

@@ -378,9 +378,6 @@
         }],
       ],
       'msvs_settings': {
-        'VCLinkerTool': {
-          'SubSystem': 1, # /subsystem:console
-        },
         'VCManifestTool': {
           'EmbedManifest': 'true',
           'AdditionalManifestFiles': 'src/res/node.exe.extra.manifest'