loongson/pypi: links for mtsc

loongson/mirror mtSC-1.3.tar.gz
loongson/mirror mtSC-1.3-py3-none-any.whl
loongson/mirror mtSC-1.2.tar.gz
loongson/mirror mtSC-1.2-py3-none-any.whl
loongson/mirror mtSC-1.0-py3-none-any.whl