message: add python, python-dev
diff: @@ -205,6 +205,7 @@ prepare_linux_toolchain() {
  sudo apt-get install -qq g++-7 g++-7-multilib swig
  sudo apt-get install build-essential gradle
  sudo apt-get install openjdk-11-jdk-headless
  + sudo apt-get install python python-dev
  echo "done preparing linux toolchain"
  }
  