loongson/mirror: links for ledgerhelpers

loongson/mirror ledgerhelpers-0.3.10.tar.gz
loongson/mirror ledgerhelpers-0.3.9.tar.gz
loongson/mirror ledgerhelpers-0.3.8.tar.gz
loongson/mirror ledgerhelpers-0.3.7.tar.gz
loongson/mirror ledgerhelpers-0.3.6.tar.gz
loongson/mirror ledgerhelpers-0.3.5.tar.gz