message: Explicitly import subprocess
  For some reason on one of our bots subprocess wasn't already
  imported. Do so explicitly.
diff: @@ -9,6 +9,7 @@ import os
  import time
  import re
  import lldb
  +import subprocess
  import lldbsuite.test.lldbutil as lldbutil
  from lldbsuite.test.lldbtest import *
  from lldbsuite.test import decorators
  