Update security string to 2016-09-07 to platform and CTS for September   respin am: cc5148493f am: 637fa9c4c5 am: 5ed4043667 am: 48e00645fe am: f63dfac0e3 am: a14e8c2f31 am: d5c59f3b97  -s ours am: cdbdfcdbd5 am: afe698d76e
am: 0a3ae2d78d

Change-Id: I6d317744f1269b1760d4c12a734e3377033acbd7