ch: virCHProcessEvent() update domain info after reboot

ch: virCHProcessEvent() update domain info after reboot

When the domain was rebooted, some of its properties were changed but
not updated in the transient domain definition. This led to the
inability to connect to the serial console as its path had changed
during the reboot but was not updated in the domain definition.

Added VIR_CH_EVENT_VM_REBOOTED event handling to update the
information in transient domain definition after domain's reboot is
completed to maintain it in consistent state.

Signed-off-by: Kirill Shchetiniuk <kshcheti@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>