loongson/pypi: links for matplotlibhelper

loongson/mirror matplotlibhelper-0.0.10.tar.gz
loongson/mirror matplotlibhelper-0.0.9.tar.gz
loongson/mirror matplotlibhelper-0.0.8.tar.gz
loongson/mirror matplotlibhelper-0.0.7.tar.gz
loongson/mirror matplotlibhelper-0.0.6.tar.gz
loongson/mirror matplotlibhelper-0.0.5.tar.gz
loongson/mirror matplotlibhelper-0.0.4.tar.gz