Update README.md

tensorflow2fluid/README.md

@@ -139,3 +139,7 @@ if __name__ == "__main__":
     exe, prog, result = model_initialize()
     test_case(exe, prog, result)
 ```
+
+## Link
+
+[MMdnn-Tensorflow](https://github.com/Microsoft/MMdnn/tree/master/mmdnn/conversion/tensorflow)