loongson/mirror: links for pyqtdoc

loongson/mirror PyQtdoc-5.15.0-py2.py3-none-any.whl
loongson/mirror PyQtdoc-5.5.1.win32.exe
loongson/mirror PyQtdoc-5.5.1.win-amd64.exe
loongson/mirror PyQtdoc-4.8.7.zip
loongson/mirror PyQtdoc-4.8.4.zip