message: Fix decorator
  To run the test the decorator function should return None, not False.
  Returning anything other than None skips the test.
diff: @@ -827,6 +827,8 @@ def skipUnlessFeature(feature):
  def skipIfSanitized(func):
  """Skip this test if the environment is set up to run LLDB itself under ASAN."""
  def is_sanitized():
  - return (('DYLD_INSERT_LIBRARIES' in os.environ) and
  - 'libclang_rt.asan' in os.environ['DYLD_INSERT_LIBRARIES'])
  + if (('DYLD_INSERT_LIBRARIES' in os.environ) and
  + 'libclang_rt.asan' in os.environ['DYLD_INSERT_LIBRARIES']):
  + return "ASAN unsupported"
  + return None
  return skipTestIfFn(is_sanitized)(func)
  