python: Fix export of virDomainSnapshotListChildrenNames
python: Fix export of virDomainSnapshotListChildrenNames

Commit f2013c9dd1ce468b8620ee35c232a93ef7026fb0 added implementation of
virDomainSnapshotListChildrenNames override export, but registration of
the newly exported function was not added.

 *python/libvirt-override.c: - register export of function

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