loongson/mirror: links for pdfminer2

loongson/mirror pdfminer2-20151206.tar.gz
loongson/mirror pdfminer2-20151206.macosx-10.10-x86_64.tar.gz
loongson/mirror pdfminer2-20151206-py2.py3-none-any.whl
loongson/mirror pdfminer2-20151206-py2-none-any.whl