loongson/mirror: links for opendem

loongson/mirror opendem-0.0.23.tar.gz
loongson/mirror opendem-0.0.22.tar.gz
loongson/mirror opendem-0.0.21.tar.gz
loongson/mirror opendem-0.0.2.tar.gz
loongson/mirror opendem-0.0.1.tar.gz