loongson/pypi: links for trext

loongson/mirror TRExt-0.2.1.tar.gz
loongson/mirror TRExt-0.2.1-py2-none-any.whl
loongson/mirror TRExt-0.2.0.tar.gz
loongson/mirror TRExt-0.2.0-py2-none-any.whl