loongson/pypi: links for polygon2

loongson/mirror Polygon2-2.0.8.win-amd64-py2.7.exe
loongson/mirror Polygon2-2.0.8.tar.gz
loongson/mirror Polygon2-2.0.8.linux-x86_64.tar.gz
loongson/mirror Polygon2-2.0.7.zip
loongson/mirror Polygon2-2.0.7.win32-py2.7.exe
loongson/mirror Polygon2-2.0.7.win32-py2.7-withNumPy.exe