grouper: update prebuilt kernel

5a1205b cgroup: remove synchronize_rcu() from cgroup_attach_{task|proc}()
47f8221 net: ipv6: Add a sysctl to make optimistic addresses useful candidates

b/17769720 Please cherry-pick optimistic addresses kernel change from net-next
b/18180674 Don't use IP address from wrong interface while performing DAD
b/18081205 APP launch speed is slower than KK

Change-Id: Ib428f0d17478fbfc5e3d5d337847401247238446
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/kernel b/kernel
index db2d4cd..7aaead0 100644
--- a/kernel
+++ b/kernel
Binary files differ