loongson/pypi: links for libserial26

loongson/mirror LibSerial26-0.5.tar.gz
loongson/mirror LibSerial26-0.4.tar.gz
loongson/mirror LibSerial26-0.3.tar.gz
loongson/mirror LibSerial26-0.2.tar.gz
loongson/mirror LibSerial26-0.1.tar.gz