loongson/pypi: links for python-mercuryapi

loongson/mirror python-mercuryapi-0.5.3.tar.gz
loongson/mirror python-mercuryapi-0.5.2.tar.gz
loongson/mirror python-mercuryapi-0.5.1.tar.gz
loongson/mirror python-mercuryapi-0.5.0.tar.gz
loongson/mirror python-mercuryapi-0.4.2.post1.tar.gz
loongson/mirror python-mercuryapi-0.4.1.tar.gz
loongson/mirror python-mercuryapi-0.4.tar.gz