hammerhead: update prebuilt kernel

c31cb97 ARM: msm: hammerhead: Switch to non-DFS channel locale table
5c6611d net: wireless: bcmdhd: Changed sync mechanism for batch get

Linux version 3.4.0-gc31cb97 (android-build@kpdm5.cbf.corp.google.com)
 (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Thu Aug 21 16:33:31 PDT 2014

Bug: 17166655
Bug: 17071068
Change-Id: I423be0deacbf3a58cfeaccca7287f54696751a76
diff --git a/zImage-dtb b/zImage-dtb
index 940d850..4d28aa4 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ