ninja windows: more support for VS macros

test/win/vs-macros/containing-gyp.gyp

+# Copyright (c) 2012 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.
+
+{
+ 'targets': [
+    {
+      'target_name': 'test_expansions',
+      'msvs_cygwin_shell': 0,
+      'type': 'none',
+      'rules': [
+        {
+          'rule_name': 'assembler (gnu-compatible)',
+          'msvs_cygwin_shell': 0,
+          'msvs_quote_cmd': 0,
+          'extension': 'S',
+          'inputs': [
+            'as.py',
+            '$(InputPath)'
+          ],
+          'outputs': [
+            '$(IntDir)/$(InputName).obj',
+          ],
+          'action':
+            ['python',
+              'as.py',
+              '-a', '$(PlatformName)',
+              '-o', '$(IntDir)/$(InputName).obj',
+              '-p', '<(DEPTH)',
+              '$(InputPath)'],
+          'message': 'Building assembly language file $(InputPath)',
+          'process_outputs_as_sources': 1,
+        },
+      ],
+      'sources': [
+        'input.S',
+      ],
+    },
+  ]
+}