hammerhead: update prebuilt kernel

42fe48d net: wireless: bcmdhd: Added wake dump counters
9f27dc0 wakeup_reason: use vsnprintf instead of snprintf for vargs.

Bug 22776056
Bug 22368519

Change-Id: I772c23f8a3ad73cb9e227aa01ff17e25e89f19ad
diff --git a/zImage-dtb b/zImage-dtb
index 8f7b837..15ed796 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ