ninja windows: make sure there's a trailing slash on $(VCInstallDir)

pylib/gyp/msvs_emulation.py

 # 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.
 
 """
 This module helps emulate Visual Studio 2008 behavior on top of other
 build systems, primarily ninja.
 """
 
 import os
@@ skipping 136 matching lines @@
       for configname, config in configs.iteritems():
         getattr(self, field)[configname] = config.get(field, default())
 
     self.msvs_cygwin_dirs = spec.get('msvs_cygwin_dirs', ['.'])
 
   def GetVSMacroEnv(self, base_to_build=None):
     """Get a dict of variables mapping internal VS macro names to their gyp
     equivalents."""
     replacements = {
         '$(VSInstallDir)': self.vs_version.Path(),
-        '$(VCInstallDir)': os.path.join(self.vs_version.Path(), 'VC'),
+        '$(VCInstallDir)': os.path.join(self.vs_version.Path(), 'VC') + '\\',
         '$(OutDir)\\': base_to_build + '\\' if base_to_build else '',
         '$(IntDir)': '$!INTERMEDIATE_DIR',
         '$(InputPath)': '${source}',
         '$(InputName)': '${root}',
         '$(ProjectName)': self.spec['target_name'],
         '$(PlatformName)': 'Win32', # TODO(scottmg): Support for x64 toolchain.
     }
     # Chromium uses DXSDK_DIR in include/lib paths, but it may or may not be
     # set. This happens when the SDK is sync'd via src-internal, rather than
     # by typical end-user installation of the SDK. If it's not set, we don't
@@ skipping 295 matching lines @@
   return vs.SetupScript()
 
 def ExpandMacros(string, expansions):
   """Expand $(Variable) per expansions dict. See MsvsSettings.GetVSMacroEnv
   for the canonical way to retrieve a suitable dict."""
   if '$' in string:
     for old, new in expansions.iteritems():
       assert '$(' not in new, new
       string = string.replace(old, new)
   return string