loongson/pypi: links for language-middleware

loongson/mirror language_middleware-0.6.tar.gz
loongson/mirror language_middleware-0.5.tar.gz
loongson/mirror language_middleware-0.4.tar.gz
loongson/mirror language_middleware-0.3.tar.gz
loongson/mirror language_middleware-0.2.0.tar.gz