mako: update prebuilt kernel

f75bb4f Increase watchdog bark timeout to 45s

Bug: 18759528

Linux version 3.4.0-perf-gf75bb4f (android-build@vpbs1.mtv.corp.google.com)
(gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #1 SMP PREEMPT
Thu Mar 12 01:01:21 UTC 2015

Change-Id: Iede0dd891468a05fdf69064c5511eeb3ef512429
diff --git a/kernel b/kernel
index a472416..7e8c927 100644
--- a/kernel
+++ b/kernel
Binary files differ