loongson/pypi: links for pybcs

loongson/mirror pybcs-1.2.91.tar.gz
loongson/mirror pybcs-1.2.9.tar.gz
loongson/mirror pybcs-1.2.5.tar.gz
loongson/mirror pybcs-1.2.4.tar.gz
loongson/mirror pybcs-1.2.3.tar.gz
loongson/mirror pybcs-1.2.2.tar.gz
loongson/mirror pybcs-1.2.1.tar.gz
loongson/mirror pybcs-1.2.tar.gz