Remove utopic and add vivid package targets

Change-Id: Ib933a24f7df150b036e30894162273634f12eb46
diff --git a/packaging.mk b/packaging.mk
index 9365e3a..3fa5242 100644
--- a/packaging.mk
+++ b/packaging.mk
@@ -2,7 +2,7 @@
 PPA=ppa:named-data/ppa-dev
 
 # List of target distributions
-DISTROS=precise trusty utopic
+DISTROS=precise trusty vivid
 
 DEBUILD=debuild -S