loongson/mirror: links for omdrivers

loongson/mirror omdrivers-1.2.490-py2.py3-none-any.whl
loongson/mirror omdrivers-1.2.439-py2.py3-none-any.whl
loongson/mirror omdrivers-1.1.268-py2.py3-none-any.whl