hammerhead: update prebuilt kernel

c52e5d8 SELinux: ss: Fix policy write for ioctl operations

Linux version 3.4.0-gc52e5d8 (android-build@wpiy11.hot.corp.google.com)
(gcc version 4.8 (GCC) ) #1 SMP PREEMPT Tue May 5 23:28:39 UTC 2015
Linux version

Bug: 19808833
Change-Id: I9a58a71759e668e640b259fdf78eb2bd96815387
Signed-off-by: Vineeta Srivastava <vsrivastava@google.com>
diff --git a/zImage-dtb b/zImage-dtb
index 5711a73..893883a 100755
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ