include python binding in hamlib

[km4ack]

Reference: https://github.com/Hamlib/Hamlib/blob/master/bindings/README.python and https://groups.io/g/KM4ACK-Pi/message/11752

[SpudGunMan]

pyver=$(python3 -V | sed 's/Python //')

./configure --with-xml-support --with-python-binding PYTHON_VERSION=$pyver