loongson/pypi: links for ydk-service-gnmi

loongson/mirror ydk-service-gnmi-0.4.0.5.tar.gz
loongson/mirror ydk-service-gnmi-0.4.0.post4.tar.gz
loongson/mirror ydk-service-gnmi-0.4.0.post2.tar.gz
loongson/mirror ydk-service-gnmi-0.4.0.post1.tar.gz
loongson/mirror ydk-service-gnmi-0.4.0.tar.gz