message: update xpu memory size
diff: @@ -132,7 +132,7 @@ class LocalPredictor(object):
  ops_filter=[])
  if use_xpu:
  - config.enable_xpu(100 * 1024 * 1024)
  + config.enable_xpu(8 * 1024 * 1024)
  self.predictor = create_paddle_predictor(config)
  