update setup.py

server/build.sh

-protoc visualdl/onnx/onnx.proto --python_out .
-python setup.py bdist_wheel
+script=$(readlink -f "$0")
+script_path=$(dirname "$script")
+
+pushd $script_path
+  protoc visualdl/onnx/onnx.proto --python_out .
+  python setup.py bdist_wheel
+popd

server/setup.py

 from setuptools import setup
 
-packages = ['visualdl', 'visualdl.frontend.dist', 'visualdl.mock']
+packages = ['visualdl',
+            'visualdl.onnx',
+            'visualdl.mock',
+            'visualdl.frontend.dist']
 
 setup(
     name="visualdl",