loongson/pypi: links for restring

loongson/mirror restring-0.1.21.tar.gz
loongson/mirror restring-0.1.20.tar.gz
loongson/mirror restring-0.1.19.tar.gz
loongson/mirror restring-0.1.18.tar.gz
loongson/mirror restring-0.1.17.tar.gz
loongson/mirror restring-0.1.16.tar.gz
loongson/mirror restring-0.1.15.tar.gz
loongson/mirror restring-0.1.3.tar.gz
loongson/mirror restring-0.1.2.tar.gz