loongson/pypi: links for pydiff

loongson/mirror pydiff-0.2.tar.gz
loongson/mirror pydiff-0.1.3.tar.gz
loongson/mirror pydiff-0.1.2.tar.gz
loongson/mirror pydiff-0.1.1.tar.gz
loongson/mirror pydiff-0.1.tar.gz