Updating security string to 2016-09-05 in preparation for 2016 September OTA for b/30224278 am: a234c54e2a am: 48e360c73b am: a08cbbb97c am: a96455528c am: d6eb8a739d am: 8118421197
am: ed2fbe64ff  -s ours

Change-Id: I898a77183877016cc9411a5d124548c4d60d2b26