loongson/pypi: links for pyassimp

loongson/mirror pyassimp-5.2.5.tar.gz
loongson/mirror pyassimp-4.1.4.tar.gz
loongson/mirror pyassimp-4.1.3.tar.gz
loongson/mirror pyassimp-4.1.2.tar.gz
loongson/mirror pyassimp-4.1.1.tar.gz
loongson/mirror pyassimp-3.3.tar.gz
loongson/mirror pyassimp-0.1.tar.gz