message: install gsutil through pip3
diff: @@ -54,8 +54,7 @@ jobs:
  - python -m pip install --upgrade pip
  - pip3 install --upgrade pip
  - pip3 install awscli
  - - curl https://storage.googleapis.com/pub/gsutil.tar.gz --output gsutil.tar.gz
  - - tar xfz gsutil.tar.gz -C $HOME
  + - pip3 install gsutil
  before_script:
  - mkdir -p extern/build
  - cd extern/build
  