loongson/pypi: links for pypt

loongson/mirror PyPT-0.6.0.tar.gz
loongson/mirror PyPT-0.5.1.tar.gz
loongson/mirror PyPT-0.5.0.tar.gz
loongson/mirror PyPT-0.4.2.tar.gz
loongson/mirror PyPT-0.4.1.tar.gz
loongson/mirror PyPT-0.4.0.tar.gz