Add Ninja support for MSVS $(TargetExt), $(TargetFileName) and $(TargetPath) macros.

test/win/gyptest-macro-targetfilename.py

+#!/usr/bin/env python
+
+# Copyright (c) 2014 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.
+
+"""
+Make sure macro expansion of $(TargetFileName) is handled.
+"""
+
+import TestGyp
+
+import sys
+
+if sys.platform == 'win32':
+  test = TestGyp.TestGyp(formats=['msvs', 'ninja'])
+
+  CHDIR = 'vs-macros'
+  test.run_gyp('targetfilename.gyp', chdir=CHDIR)
+  test.build('targetfilename.gyp', test.ALL, chdir=CHDIR)
+  test.built_file_must_exist('test_targetfilename_executable.exe', chdir=CHDIR)
+  test.built_file_must_exist('test_targetfilename_loadable_module.dll',
+                             chdir=CHDIR)
+  test.built_file_must_exist('test_targetfilename_shared_library.dll',
+                             chdir=CHDIR)
+  test.built_file_must_exist('test_targetfilename_static_library.lib',
+                             chdir=CHDIR)
+  test.built_file_must_exist('test_targetfilename_product_extension.foo',
+                             chdir=CHDIR)
+  test.pass_test()