Add job to build dpdk-extra for newton

Change-Id: I417eff112ebec81cc609076616fff569b55ce003
diff --git a/jenkins/client/job/opencontrail/build/dpdk-extra.yml b/jenkins/client/job/opencontrail/build/dpdk-extra.yml
index f250a8c..5b128a2 100644
--- a/jenkins/client/job/opencontrail/build/dpdk-extra.yml
+++ b/jenkins/client/job/opencontrail/build/dpdk-extra.yml
@@ -21,6 +21,10 @@
               dist: xenial
               branch_name: mitaka
               branch_real_name: mitaka
+            - os: ubuntu
+              dist: xenial
+              branch_name: newton
+              branch_real_name: newton
           template:
             discard:
              build: