[PYTHON] Set sitecustomize.py on CircleCI.

For products with sys.getdefaultencoding ()! ='ascii', sitecustomize.py is required.

`sitecustomize.py.cirlceci`


# -*- coding: utf-8 -*-
import sys
sys.setdefaultencoding('utf-8')

`circle.yml`


dependencies:
  pre:
    - cp circleci/sitecustomize.py venv/lib/python2.7/sitecustomize.py

Like this.

I copied it to venv / lib / python2.7 / site-packages all the time and it didn't work and I was crying. In this case, CircleCI is Debian-based, so there is a file in /usr/lib/python2.7/sitecustomize.py and that is prioritized.