message: Fix a bug: append the original path when updating the path.
diff: @@ -68,7 +68,7 @@ before_install:
  echo "Using PYTHONUSERBASE=$PYTHONUSERBASE"
  pip install --user cpp-coveralls;
  pip install --user pyyaml;
  - PATH=$HOME/local/bin;
  + PATH=$HOME/local/bin:$PATH;
  fi
  # Update environment to find g++ 4.9 installation first.
  