Add pip install paddle wheel package in Dockerfile

Author: gangliao

paddle/scripts/docker/build.sh

@@ -98,6 +98,7 @@ ADD build/*.deb /usr/local/opt/paddle/deb/
 # run paddle version to install python packages first
 RUN dpkg -i /usr/local/opt/paddle/deb/*.deb && \
     rm -f /usr/local/opt/paddle/deb/*.deb && \
+    pip install /usr/opt/paddle/share/wheels/*.whl && \
     paddle version
 ${CPU_DOCKER_PYTHON_HOME_ENV}
 ${DOCKERFILE_CUDNN_DSO}