Updates boot-stack iptables file

Once we move to a readonly root filesystem we cannot store
the .ok file in the git tree.  This patch relies on the
add-rule script which checks for the rule before inserting
it and does not require an .ok file for state.

Change-Id: Ic75baab31ec4ddd8c346c22aaaf5604ce6c3f8fa
Merge "Updates boot-stack iptables file"