[libvirt] expose via api event about changing domain metadata

[Vasiliy Tolstov]

Hello. I have in domain metadata some info that i need , but now i
need to notify when the info changed.
Does it possible to add even about changing domain metadata like other
events (http://libvirt.org/html/libvirt-libvirt-domain.html#virDomainEventID)

-- 
Vasiliy Tolstov,
e-mail: v.tolstov at selfip.ru
jabber: vase at selfip.ru