TBR: fix build (veyron/services/mgmt/node/impl/proxy_invoker_test)

Change-Id: I24f964e1ab9efdde0ed3f0c8234a97d4959ac7d0
diff --git a/services/mgmt/node/impl/proxy_invoker_test.go b/services/mgmt/node/impl/proxy_invoker_test.go
index 4846998..b27c671 100644
--- a/services/mgmt/node/impl/proxy_invoker_test.go
+++ b/services/mgmt/node/impl/proxy_invoker_test.go
@@ -5,6 +5,7 @@
 	"sort"
 	"testing"
 
+	"veyron.io/veyron/veyron2/ipc"
 	"veyron.io/veyron/veyron2/naming"
 	"veyron.io/veyron/veyron2/rt"
 	"veyron.io/veyron/veyron2/security"