Create appropriate .zip from .ovf and .vmdk

Change-Id: I1bc53df19f4670cd38bb2258083e113afba32835
diff --git a/jobs.yaml b/jobs.yaml
index 2ebf407..6916e9e 100644
--- a/jobs.yaml
+++ b/jobs.yaml
@@ -38,6 +38,7 @@
       - timed: "@midnight"
     builders:
       - shell: stdbuf -oL -eL mispipe "~mininet/mininet/util/vm/build.py -v --test sanity {flavor}"  "tr '\r' ' '"
+      - shell: zip `basename -s .ovf */*.ovf`.zip */*.+(vmdk|ovf)
     publishers:
       - archive:
             artifacts: '**'