loongson/pypi: links for search-placeholder

loongson/mirror search_placeholder-0.2.0.tar.gz
loongson/mirror search_placeholder-0.2.0-py3-none-any.whl
loongson/mirror search_placeholder-0.1.2.tar.gz
loongson/mirror search_placeholder-0.1.2-py3-none-any.whl
loongson/mirror search_placeholder-0.1.1.tar.gz
loongson/mirror search_placeholder-0.1.1-py3-none-any.whl