shamu: update prebuilt kernel

aba2a80 arm/dt: shamu: VREG L18A is always-on for Shamu
f8ffa28 msm: mdss: double check mdp ping pong done state

b/16601374 Charging is still miserable (starts discharging when the battery
	   gets close to full)
b/16577746 Watchdog resets
Signed-off-by: Iliyan Malchev <malchev@google.com>

Change-Id: I52b86d286c2222f0b375d3f68b1cfe2799247ee5
diff --git a/zImage-dtb b/zImage-dtb
index 96ae54e..8319dc2 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ