loongson/pypi: links for btrfsutil

loongson/mirror btrfsutil-6.16.1.tar.gz
loongson/mirror btrfsutil-6.16.tar.gz
loongson/mirror btrfsutil-6.14.tar.gz
loongson/mirror btrfsutil-6.13.tar.gz
loongson/mirror btrfsutil-6.12.tar.gz
loongson/mirror btrfsutil-6.11.tar.gz
loongson/mirror btrfsutil-6.10.tar.gz