v3rpc: add compacted field from wresp

etcdserver/api/v3rpc/watch.go

@@ -146,9 +146,10 @@ func (sws *serverWatchStream) sendLoop() {
 			}
 
 			err := sws.gRPCStream.Send(&pb.WatchResponse{
-				Header:  sws.newResponseHeader(wresp.Revision),
-				WatchId: int64(wresp.WatchID),
-				Events:  events,
+				Header:    sws.newResponseHeader(wresp.Revision),
+				WatchId:   int64(wresp.WatchID),
+				Events:    events,
+				Compacted: wresp.Compacted,
 			})
 			storage.ReportEventReceived()
 			if err != nil {