Update LogDog client to export its host.

logdog/client/coordinator/stream.go

Index: logdog/client/coordinator/stream.go
diff --git a/logdog/client/coordinator/stream.go b/logdog/client/coordinator/stream.go
index 6142af651df9cf0ded2a49c729e2c7d92b95a725..c93e3f40cc56865754d70e70cb8720099a887776 100644
--- a/logdog/client/coordinator/stream.go
+++ b/logdog/client/coordinator/stream.go
@@ -314,9 +314,15 @@ func loadStatePointer(stateP *LogStream, resp *logdog.GetResponse) error {
 		return nil
 	}
 
+	// The service should always return this when requested, but handle the case
+	// where it doesn't for completeness.
+	if resp.Desc == nil {
+		return errors.New("descriptor was not returned")
+	}
+
 	ls, err := loadLogStream(resp.Project, resp.Desc.Path(), resp.State, resp.Desc)
 	if err != nil {
-		return fmt.Errorf("failde to load stream state: %v", err)
+		return fmt.Errorf("failed to load stream state: %v", err)
 	}
 
 	*stateP = *ls