angler: update prebuilt kernel

688d8e3 ARM: dts: msm: remove supply resources in DSI PLL for 8994

Bug: 24301144

Linux version 3.10.73-g688d8e3 (android-build@wpee3.hot.corp.google.com)
(gcc version 4.9.x-google 20140827 (prerelease) (GCC) ) #1 SMP PREEMPT Wed Sep 23 22:38:25 UTC 2015

Change-Id: If83707f170a4e7183ee82190aad46a15f41dd006
Signed-off-by: Patrick Tjin <pattjin@google.com>