hammerhead: update prebuilt kernel

b6c0298 msm: vidc: add check for handling release buffer in dynamic buffer mode

Linux version 3.4.0-gb6c0298 (android-build@vpee15.mtv.corp.google.com)
(gcc version 4.8 (GCC) ) #1 SMP PREEMPT Sat Aug 1 08:59:57 UTC 2015
Linux version

Bug: 21669569
Change-Id: I872d2e9e3b314da74faf1547e6ec706d338cecdd
Signed-off-by: Vineeta Srivastava <vsrivastava@google.com>
diff --git a/zImage-dtb b/zImage-dtb
index 5b4048a..8f7b837 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ