shamu: update prebuilt kernel

cb42f1e msm: arm: krait: Patch for krait array access out of bound
788b7ca net: wireless: bcmdhd: Add checks for stack buffer overflows

Linux version 3.10.40-gcb42f1e (android-build@vped11.mtv.corp.google.com)
(gcc version 4.8 (GCC) ) #1 SMP PREEMPT Wed Dec 9 23:54:39 UTC 2015

Bug: 25258438
Bug: 25773204
Change-Id: I7011c5ecc20287b0aa3017c49f0e95e62b2be9b3
Signed-off-by: Yuan Lin <yualin@google.com>
diff --git a/zImage-dtb b/zImage-dtb
index 206a358..3200544 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ