loongson/pypi: links for xrcwidgets

loongson/mirror XRCWidgets-0.3.0.tar.gz
loongson/mirror XRCWidgets-0.2.1.win32.exe
loongson/mirror XRCWidgets-0.2.1.tar.gz
loongson/mirror XRCWidgets-0.2.0.tar.gz
loongson/mirror XRCWidgets-0.1.8.tar.gz