[test-runner] Move test case processing beyond the multi-process boundary.

tools/run-deopt-fuzzer.py

 #!/usr/bin/env python
 #
 # Copyright 2012 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 298 matching lines @@
       suite = arg.split(os.path.sep)[0]
       if not suite in args_suites:
         args_suites.add(suite)
     suite_paths = [ s for s in suite_paths if s in args_suites ]
 
   suites = []
   for root in suite_paths:
     suite = testsuite.TestSuite.LoadTestSuite(
         os.path.join(workspace, "test", root))
     if suite:
+      suite.SetupWorkingDirectory()
       suites.append(suite)
 
   if options.download_data:
     for s in suites:
       s.DownloadData()
 
   for mode in options.mode:
     for arch in options.arch:
       try:
         code = Execute(arch, mode, args, options, suites, workspace)
@@ skipping 151 matching lines @@
   print(">>> Deopt fuzzing phase (%d test cases)" % num_tests)
   progress_indicator = progress.PROGRESS_INDICATORS[options.progress]()
   runner = execution.Runner(suites, progress_indicator, ctx)
 
   code = runner.Run(options.j)
   return exit_code or code
 
 
 if __name__ == "__main__":
   sys.exit(Main())