Fix passing of shard options 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 179 matching lines @@
     result += ['--isolates']
   if not options.store_unexpected_output:
     result += ['--no-store-unexpected_output']
   if options.stress_only:
     result += ['--stress-only']
   if options.nostress:
     result += ['--nostress']
   if options.crankshaft:
     result += ['--crankshaft']
   if options.shard_count != 1:
-    result += ['--shard_count=%s' % options.shard_count]
+    result += ['--shard-count=%s' % options.shard_count]
   if options.shard_run != 1:
-    result += ['--shard_run=%s' % options.shard_run]
+    result += ['--shard-run=%s' % options.shard_run]
   if options.noprof:
     result += ['--noprof']
   return result
 
 
 def Main():
   parser = BuildOptions()
   (options, args) = parser.parse_args()
   if not ProcessOptions(options):
     parser.print_help()
@@ skipping 37 matching lines @@
                              shell=True,
                              cwd=workspace,
                              env=env)
     returncodes = child.wait()
 
   return returncodes
 
 
 if __name__ == '__main__':
   sys.exit(Main())