ci-dockerfiles-sanity-check: Add verbatim from upstream repo

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ic4e32d081e2f9ac30bad50ba0e2edf84ecca2aa7
diff --git a/ci-dockerfiles-deployment/cleanup-update.sh b/ci-dockerfiles-deployment/cleanup-update.sh
new file mode 100644
index 0000000..a0a3abe
--- /dev/null
+++ b/ci-dockerfiles-deployment/cleanup-update.sh
@@ -0,0 +1,14 @@
+#!/bin/bash -e
+
+for image in $(docker images|grep trustedfirmware|grep -v none|awk '{ print $1":"$2}');
+do
+    echo update: $image:
+    if ! docker pull $image
+    then
+        echo could not fetch image from dockerhub, delete
+        docker rmi $image||true
+    fi
+done
+
+echo cleaning up
+docker system prune -f