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

Change-Id: I8b5cc4ff2992ffe0f229a811076b215b7d0ab0af