loongson/pypi: links for flask-bootstrap3

loongson/mirror Flask-Bootstrap3-3.1.1.3.tar.gz
loongson/mirror Flask-Bootstrap3-3.1.1.2.tar.gz
loongson/mirror Flask-Bootstrap3-3.1.1.1.tar.gz
loongson/mirror Flask-Bootstrap3-3.1.1.0.tar.gz