loongson/mirror: links for pydot3

loongson/mirror pydot3-1.0.9.tar.gz
loongson/mirror pydot3-1.0.8.tar.gz
loongson/mirror pydot3-1.0.7.tar.gz
loongson/mirror pydot3-1.0.6.tar.gz
loongson/mirror pydot3-1.0.4.tar.gz
loongson/mirror pydot3-1.0.3.tar.gz
loongson/mirror pydot3-1.0.2.tar.gz