loongson/mirror: links for gcoupler

loongson/mirror Gcoupler-2.1.8.tar.gz
loongson/mirror Gcoupler-2.1.8-py3-none-any.whl
loongson/mirror gcoupler-1.4.tar.gz
loongson/mirror gcoupler-1.4-py3-none-any.whl
loongson/mirror gcoupler-1.2.tar.gz
loongson/mirror gcoupler-1.2-py3-none-any.whl
loongson/mirror Gcoupler-1.0.tar.gz
loongson/mirror Gcoupler-1.0-py3-none-any.whl