override: domain: Implement override for virDomainSetThrottleGroup()

The bindings generator can't generate proper bindings for
virDomainSetThrottleGroup() (because of typed parameters in the
arguments) so implement it manually.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

generator.py

@@ -441,6 +441,7 @@ skip_impl = {
     'virDomainSaveParams',
     'virDomainRestoreParams',
     'virDomainGetAutostartOnce',
+    'virDomainSetThrottleGroup',
 
     'virDomainLxcOpenNamespace',