message: Help build_pip_package work without ./configure
  If the ./configure tool isn't run this script won't exist. It should
  be safe to ignore this file if it isn't present since the variable
  expansion below will just default to whatever python is on the PATH.
diff: @@ -160,7 +160,9 @@ function main() {
  # Before we leave the top-level directory, make sure we know how to
  # call python.
  + if [[ -e tools/python_bin_path.sh ]]; then
  source tools/python_bin_path.sh
  + fi
  pushd ${TMPDIR}
  rm -f MANIFEST
  