Fix msvs-ninja clean build command / target.

pylib/gyp/generator/msvs.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.
 
 import copy
 import ntpath
 import os
 import posixpath
 import re
 import subprocess
@@ skipping 1810 matching lines @@
         path_to_ninja,
         '-C',
         '$(OutDir)',
         '$(ProjectName)',
       ]
     if not spec.get('msvs_external_builder_clean_cmd'):
       spec['msvs_external_builder_clean_cmd'] = [
         path_to_ninja,
         '-C',
         '$(OutDir)',
-        '-t',
-        'clean',
+        '-tclean',
         '$(ProjectName)',
       ]
 
 
 def CalculateVariables(default_variables, params):
   """Generated variables that require params to be known."""
 
   generator_flags = params.get('generator_flags', {})
 
   # Select project file format version (if unset, default to auto detecting).
@@ skipping 1472 matching lines @@
   action_spec.extend(
       # TODO(jeanluc) 'Document' for all or just if as_sources?
       [['FileType', 'Document'],
        ['Command', command],
        ['Message', description],
        ['Outputs', outputs]
       ])
   if additional_inputs:
     action_spec.append(['AdditionalInputs', additional_inputs])
   actions_spec.append(action_spec)