Clean up temporary files on exit

Change-Id: I3568c76529fe3f66a5d8b8e5bdaa365f56c589a8
diff --git a/tools/build/onos-buck-publish-local b/tools/build/onos-buck-publish-local
index 8bebeaa..d47f72d 100755
--- a/tools/build/onos-buck-publish-local
+++ b/tools/build/onos-buck-publish-local
@@ -4,6 +4,8 @@
 onos-buck -V
 
 rm -f /tmp/publish.sh
+trap "rm -f /tmp/publish.sh /tmp/publish.sh.bak" EXIT
+
 
 onos-buck query "kind('onos_jar', deps('//tools/package:onos-package'))" >> /tmp/publish.sh