loongson/pypi: links for checkit

loongson/mirror checkit-0.3.2b.zip
loongson/mirror checkit-0.3.1b.zip
loongson/mirror checkit-0.2.3b.zip
loongson/mirror checkit-0.1.0a.zip
loongson/mirror checkit-0.1.0a.win32.exe