hammerhead: update prebuilt kernel

8314f50 msm: vidc: fix memory leak issue in dynamic buffer mode
7533645 msm: vidc: fix corruption of registered buffer list
25c968c USB: gadget: mtp: Fix hang in ioctl(MTP_RECEIVE_FILE) for WritePartialObject
df13a5d arm/dt: hammerhead: change usb otg detection level

Bug: 11973141
Bug: 12195339
Bug: 13312153
Change-Id: I574a936d653e9653b5c8cc5e0f2a92a4d091047f
diff --git a/zImage-dtb b/zImage-dtb
index 729b63d..9b0144e 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ