Include 16.04 into the build list

Change-Id: Ie7e9adbf39838238f9c38ed67ec389aadc610f42
diff --git a/packaging.mk b/packaging.mk
index e293470..bac3a17 100644
--- a/packaging.mk
+++ b/packaging.mk
@@ -2,7 +2,7 @@
 PPA=ppa:named-data/ppa-dev
 
 # List of target distributions
-DISTROS=precise trusty wily
+DISTROS=precise trusty wily xenial
 
 DEBUILD=debuild -S