Some error about building

[FelicxFoster]

When I run 'bash build.sh build', terminal showed as follow:
/apollo-contrib/obu/third_party/obu/include/cv2x_app_layer/cv2x_message_frame.h:21:49: 致命错误： asn1_source/MessageFrame.h：没有那个文件或目录
编译中断。
Then I found 'include_directories(${v2x_SOURCE_DIR}/third_party/obu/include/asn1_source)' in the CMakeList.txt. However, there is nothing in /third_party/obu/include/asn1_source.
The directory /apollo-contrib/obu/third_party is I download from https://apollo-v2x.bj.bcebos.com/obu-library.tar.gz, the url you write on README.