qemu_api: Update Py binding generator to generate files for QEMU APIs
qemu_api: Update Py binding generator to generate files for QEMU APIs

It will generate:
  libvirt-qemu.py
  libvirt-qemu.h
  libvirt-qemu.c
  libvirt-qemu-export.c

libvirt/libvirt-python,libvirt/libvirt-python,libvirt/libvirt-python,cardoe/libvirt-python,cardoe/libvirt-python,cardoe/libvirt-python