[Jenkinsfile] Build NNPACK and run tests in `ci-cpu` (#2095)

Jenkinsfile

@@ -131,6 +131,8 @@ stage('Build') {
            echo set\\(USE_SORT ON\\) >> config.cmake
            echo set\\(USE_GRAPH_RUNTIME_DEBUG ON\\) >> config.cmake
            echo set\\(USE_LLVM llvm-config-4.0\\) >> config.cmake
+           echo set\\(USE_NNPACK ON\\) >> config.cmake
+           echo set\\(NNPACK_PATH /NNPACK/build/\\) >> config.cmake
            echo set\\(CMAKE_CXX_COMPILER g++\\) >> config.cmake
            echo set\\(CMAKE_CXX_FLAGS -Werror\\) >> config.cmake
            """
@@ -140,6 +142,8 @@ stage('Build') {
           sh "${docker_run} tvmai/ci-cpu ./tests/scripts/task_cpp_unittest.sh"
           sh "${docker_run} tvmai/ci-cpu ./tests/scripts/task_python_vta.sh"
           sh "${docker_run} tvmai/ci-cpu ./tests/scripts/task_rust.sh"
+          sh "${docker_run} tvmai/ci-cpu ./tests/scripts/task_python_unittest.sh"
+          sh "${docker_run} tvmai/ci-cpu ./tests/scripts/task_python_integration.sh"
         }
       }
     }