hammerhead: update prebuilt kernel

4664522 Revert "[media] v4l2: vb2: one more fix for REQBUFS()"

b/18528130 VideoEncoderTest fails

Change-Id: Ic412153ae021b3552e24ab69b3877f6adc39e470
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/zImage-dtb b/zImage-dtb
index 45c97aa..986382a 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ