Clean out old build files before triggering a job

Change-Id: Iea79c2cae5f7aa796cbf0cdc8ceeb1b12e8d416c
diff --git a/TestON/JenkinsFile/dependencies/TriggerFuncs.groovy b/TestON/JenkinsFile/dependencies/TriggerFuncs.groovy
index 78735f1..2ca4f72 100644
--- a/TestON/JenkinsFile/dependencies/TriggerFuncs.groovy
+++ b/TestON/JenkinsFile/dependencies/TriggerFuncs.groovy
@@ -207,6 +207,8 @@
         git fetch --all # update all caches from remotes
         git reset --hard origin/''' + onos_branch + '''  # force local index to match remote branch
         git clean -df # clean any local files
+        rm -rf buck-out
+        rm -rf bazel-*
         ''' + tagCheck( onos_tag, onos_branch ) + '''
         git branch
         git log -1 --decorate