loongson/pypi: links for bfchain-pc-sdk

loongson/mirror bfchain_pc_sdk-0.0.8.tar.gz
loongson/mirror bfchain_pc_sdk-0.0.7.tar.gz
loongson/mirror bfchain_pc_sdk-0.0.6.tar.gz
loongson/mirror bfchain_pc_sdk-0.0.5.tar.gz
loongson/mirror bfchain_pc_sdk-0.0.4.tar.gz
loongson/mirror bfchain_pc_sdk-0.0.3.tar.gz
loongson/mirror bfchain_pc_sdk-0.0.2.tar.gz