hammerhead: update prebuilt kernel

c7a3a9d ARM: 7670/1: fix the memset fix
ae6c30d ARM: 7668/1: fix memset-related crashes caused by recent GCC (4.7.2) optimizations

Bug: 11563495
Change-Id: I7071a382662a9d32c6d2e026d52370951f850cf0
diff --git a/vmlinux.bz2 b/vmlinux.bz2
index 02ee442..efa36e4 100644
--- a/vmlinux.bz2
+++ b/vmlinux.bz2
Binary files differ
diff --git a/zImage-dtb b/zImage-dtb
index bf292e7..932e0c6 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ