loongson/mirror: links for blang-lang

loongson/mirror blang_lang-2.0.0.tar.gz
loongson/mirror blang_lang-2.0.0-py3-none-any.whl
loongson/mirror blang_lang-1.0.0.tar.gz
loongson/mirror blang_lang-1.0.0-py3-none-any.whl