loongson/pypi: links for pybencode

loongson/mirror pybencode-0.3.tar.gz
loongson/mirror pybencode-0.2.tar.gz
loongson/mirror pybencode-0.2.macosx-10.9-intel.tar.gz
loongson/mirror pybencode-0.1.tar.gz
loongson/mirror pybencode-0.1.macosx-10.9-intel.tar.gz