loongson/pypi: links for pyyjson

loongson/mirror pyyjson-0.2.0.tar.gz
loongson/mirror pyyjson-0.1.2-py3.9-macosx-10.9-x86_64.egg
loongson/mirror pyyjson-0.1.1-py3.9-macosx-10.9-x86_64.egg
loongson/mirror pyyjson-0.1.0-py3.9-macosx-10.9-x86_64.egg