loongson/pypi: links for gpu-bsm

loongson/mirror GPU_BSM-2.7.1.2-py2.7.egg
loongson/mirror GPU_BSM-2.7.1-py2.7.egg
loongson/mirror GPU-BSM-2.4.0.tar.gz
loongson/mirror GPU-BSM-2.3.4.tar.gz