message: Update saver.py
  Fix device placement of save_op for ResourceVariable.
diff: @@ -128,10 +128,7 @@ class BaseSaverBuilder(object):
  x = v.read_value()
  # To allow variables placed on non-CPU devices to be checkpointed,
  # we copy them to CPU on the same machine first.
  - device_spec = pydev.DeviceSpec().parse_from_string(v.device)
  - device_spec.merge_from(
  - pydev.DeviceSpec().parse_from_string("/device:CPU:0"))
  - with ops.device(device_spec.to_string()):
  + with ops.device("/device:CPU:0"):
  return array_ops.identity(x)
  return f
  