Add debian/python-pygerrit2 package build

Change-Id: I78f95641389a8816945798339a0acadca0574573
diff --git a/jenkins/client/job/debian/packages/extra.yml b/jenkins/client/job/debian/packages/extra.yml
index df9e76e..61d7ee2 100644
--- a/jenkins/client/job/debian/packages/extra.yml
+++ b/jenkins/client/job/debian/packages/extra.yml
@@ -193,6 +193,10 @@
               dist: xenial
               build: pipeline
               branch: debian/xenial
+            - package: python-pygerrit2
+              dist: xenial
+              build: pipeline
+              branch: debian/xenial
             - package: jeepyb
               dist: xenial
               build: pipeline