loongson/pypi: links for vecstatsgraph3d

loongson/mirror VecStatsGraph3d-1.3.tar.gz
loongson/mirror VecStatsGraph3d-1.2.tar.gz
loongson/mirror VecStatsGraph3d-1.1.tar.gz
loongson/mirror VecStatsGraph3d-1.0.tar.gz