loongson/mirror: links for sphinxtrap

loongson/mirror sphinxtrap-0.2.3.tar.gz
loongson/mirror sphinxtrap-0.2.2.tar.gz
loongson/mirror sphinxtrap-0.2.1.tar.gz
loongson/mirror sphinxtrap-0.1b.tar.gz
loongson/mirror sphinxtrap-0.1a.tar.gz