loongson/pypi: links for convtool

loongson/mirror ConvTool-1.0.tar.gz
loongson/mirror ConvTool-1.0-py3-none-any.whl
loongson/mirror ConvTool-0.3.tar.gz
loongson/mirror ConvTool-0.3-py3-none-any.whl
loongson/mirror ConvTool-0.2.2.3.tar.gz
loongson/mirror ConvTool-0.2.2.3-py3-none-any.whl