Add an --msan flag to run-tests.py.

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 371 matching lines @@
     "asan": options.asan,
     "deopt_fuzzer": True,
     "gc_stress": False,
     "isolates": options.isolates,
     "mode": mode,
     "no_i18n": False,
     "no_snap": False,
     "simulator": utils.UseSimulator(arch),
     "system": utils.GuessOS(),
     "tsan": False,
+    "msan": False,
   }
   all_tests = []
   num_tests = 0
   test_id = 0
 
   # Remember test case prototypes for the fuzzing phase.
   test_backup = dict((s, []) for s in suites)
 
   for s in suites:
     s.ReadStatusFile(variables)
@@ skipping 65 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())