loongson/pypi: links for xtbapi

loongson/mirror XTBApi-1.0a7.tar.gz
loongson/mirror XTBApi-1.0a6.tar.gz
loongson/mirror XTBApi-1.0a5.tar.gz
loongson/mirror XTBApi-1.0a4.tar.gz
loongson/mirror XTBApi-0.1a2.tar.gz