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 am: 41a8f2bd55 am: 48b6f7db14
am: 989e951aa2

Change-Id: Ifa303a802377ab801633562200aac66899977b00