Fix passing of --special-command flag in test wrapper.

tools/test-wrapper-gypbuild.py

 #!/usr/bin/env python
 #
 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 151 matching lines @@
   if options.report:
     result += ['--report']
   if options.suite != []:
     for suite in options.suite:
       result += ['--suite=../../test/' + suite]
   if options.timeout != 60:
     result += ['--timeout=%s' % options.timeout]
   if options.snapshot:
     result += ['--snapshot']
   if options.special_command:
-    result += ['--special-command=' + options.special_command]
+    result += ['--special-command="%s"' % options.special_command]
   if options.valgrind:
     result += ['--valgrind']
   if options.cat:
     result += ['--cat']
   if options.warn_unused:
     result += ['--warn-unused']
   if options.j != 1:
     result += ['-j%s' % options.j]
   if options.time:
     result += ['--time']
@@ skipping 63 matching lines @@
                              shell=True,
                              cwd=workspace,
                              env=env)
     returncodes = child.wait()
 
   return returncodes
 
 
 if __name__ == '__main__':
   sys.exit(Main())