message: [lite] Fix wrong comment example.
diff: @@ -710,7 +710,7 @@ class Interpreter(object):
  Example,
  ```
  input_data = np.array([1.2, 1.4], np.float32)
  - signatures = interpreter.get_signature_list()
  + signatures = interpreter._get_full_signature_list()
  print(signatures)
  # {
  # 'add': {'inputs': {'x': 1, 'y': 0}, 'outputs': {'output_0': 4}}
  