shamu: update prebuilt kernel

    f8abf98 neigh: Better handling of transition to NUD_PROBE state
    9f36f23 ext4: don't save the error information if the block device is read-only

Linux version 3.10.40-gf8abf98 (android-build@kpfj4.cbf.corp.google.com)
(gcc version 4.8 (GCC) ) #1 SMP PREEMPT Mon May 25 04:00:44 UTC 2015

Bug: 18581716
Change-Id: Ida7be0675f5a53e457077b7c7b9ac9b3693e6ded
diff --git a/zImage-dtb b/zImage-dtb
old mode 100755
new mode 100644
index 115c58f..f70a99f
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ