Update Security String to 2016-05-01 in preparation for May 2016 Security OTA...
Update Security String to 2016-05-01 in preparation for May 2016 Security OTA am: 175b7800 am: 274e4837
am: 08d9bea4
* commit '08d9bea4':
Update Security String to 2016-05-01 in preparation for May 2016 Security OTA