loongson/pypi: links for xgraph

loongson/mirror XGraph-1.4.0.tar.gz
loongson/mirror XGraph-1.3.1.tar.gz
loongson/mirror XGraph-1.3.0.zip
loongson/mirror XGraph-1.2.2.tar.gz
loongson/mirror XGraph-1.2.zip
loongson/mirror XGraph-1.1.tar.gz
loongson/mirror XGraph-1.0.tar.gz