message: Fix build_pip_package.sh
  Revert the build_pip_package.sh change in
  , which caused the keras package to be under unexpected tensorflow.python.keras
diff: @@ -216,10 +216,10 @@ function prepare_src() {
  if [ -d "${TMPDIR}/tensorflow/_api/v1/" ]
  then
  cp -r ${TMPDIR}/tensorflow/python/keras/api/_v1/keras/ ${TMPDIR}/tensorflow/keras/
  - find . -type f -maxdepth 0 -exec sed -i'.original' -e 's/.python.keras.api._v1/tensorflow/g' ${TMPDIR}/tensorflow/__init__.py {} +
  + sed -i'.original' -e 's/.python.keras.api._v1/tensorflow/g' ${TMPDIR}/tensorflow/__init__.py
  else
  cp -r ${TMPDIR}/tensorflow/python/keras/api/_v2/keras/ ${TMPDIR}/tensorflow/keras/
  - find . -type f -maxdepth 0 -exec sed -i'.original' -e 's/.python.keras.api._v2/tensorflow/g' ${TMPDIR}/tensorflow/__init__.py {} +
  + sed -i'.original' -e 's/.python.keras.api._v2/tensorflow/g' ${TMPDIR}/tensorflow/__init__.py
  fi
  }
  