Update Security String to 2016-09-07 to platform and CTS for September respin am: a53b868e6e am: e158db8ad2 am: 68870731a5 am: f7de14b8a1 am: 2d033a9e51 am: 143faf4aa4
am: a86a93bff5

Change-Id: Ibdcdc1b5aa814770052513c917fa36b8185aba23