Add virDomainCheckpoint APIs

Copies heavily from existing virDomainSnapshot handling, regarding
what special cases the generator has to be taught and what overrides
need to be written.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

libvirt-override-virDomain.py

@@ -11,6 +11,19 @@
         return retlist
 
 
+    def listAllCheckpoints(self, flags=0):
+        """List all checkpoints and returns a list of checkpoint objects"""
+        ret = libvirtmod.virDomainListAllCheckpoints(self._o, flags)
+        if ret is None:
+            raise libvirtError("virDomainListAllCheckpoints() failed", conn=self)
+
+        retlist = list()
+        for chkptr in ret:
+            retlist.append(virDomainCheckpoint(self, _obj=chkptr))
+
+        return retlist
+
+
     def createWithFiles(self, files, flags=0):
         """Launch a defined domain. If the call succeeds the domain moves from the
         defined to the running domains pools.