homogenize msvs and ninja library_dir and libraries settings for Windows

test/library_dirs/gyptest-library-dirs.py

 #!/usr/bin/env python
 
 # Copyright (c) 2013 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.
 
 """
 Verifies library_dirs (in link_settings) are properly found.
 """
 
+import sys
+
 import TestGyp
 
 test = TestGyp.TestGyp(formats=['!android'])
 
 lib_dir = test.tempdir('secret_location')
 
 test.run_gyp('test.gyp',
              '-D', 'abs_path_to_secret_library_location={0}'.format(lib_dir),
              chdir='subdir')
 
 # Must build each target independently, since they are not in each others'
 # 'dependencies' (test.ALL does NOT work here for some builders, and in any case
 # would not ensure the correct ordering).
 test.build('test.gyp', 'mylib', chdir='subdir')
 test.build('test.gyp', 'libraries-search-path-test', chdir='subdir')
 
 expect = """Hello world
 """
 test.run_built_executable(
     'libraries-search-path-test', chdir='subdir', stdout=expect)
 
+if sys.platform in ('win32', 'cygwin'):
+  test.run_gyp('test-win.gyp',
+               '-D',
+               'abs_path_to_secret_library_location={0}'.format(lib_dir),
+               chdir='subdir')
+
+  test.build('test.gyp', 'mylib', chdir='subdir')
+  test.build('test-win.gyp',
+             'libraries-search-path-test-lib-suffix',
+             chdir='subdir')
+
+  test.run_built_executable(
+        'libraries-search-path-test-lib-suffix', chdir='subdir', stdout=expect)
+
+
 test.pass_test()
 test.cleanup()