grouper: update prebuilt kernel

6881d82 ping: prevent NULL pointer dereference on write to msg_name
8a9e9ca nf: xt_qtaguid: fix handling for cases where tunnels are used.
b88bac6 netfilter: qtaguid: rate limit some of the printks

Bug: 11687690
Bug: 12780426

Change-Id: I5f3df3496e9a05351e08d0a2fd7547866dc27867
Signed-off-by: Ed Tam <etam@google.com>
diff --git a/kernel b/kernel
index 694b343..17818d1 100644
--- a/kernel
+++ b/kernel
Binary files differ