[Do Not Merge] Update platform security string to 2017-10-01 in KLP dev Bug:64896113 am: f2f5343ba1 am: dafd187ab5 am: 47c92b6200  -s ours am: bc464d7e8f  -s ours am: 5c68c85011 am: f1f39061a7  -s ours am: c5287e96a4 am: 0412b3d0e3 am: 2df41e5dec am: 09ec3bc311  -s ours am: 9dbcf7c176 am: 3eac316736 am: 319003c0d8 am: 2b7d9b23c7 am: ce869d6025  -s ours am: 2633357494
am: 0d76622c59

Change-Id: Iaa4c8ad113f6a42b3e798053c24715f1b3b31396