grouper: update prebuilt kernel

6adc37b Revert "Revert "Sensors: Some updates for Invensense v5.1.5 IIO driver release.""

Change-Id: I90fece04fdf041f6711f98410449998d090b9065
Signed-off-by: Ed Tam <etam@google.com>
diff --git a/kernel b/kernel
index 0634d7a..4a4538f 100644
--- a/kernel
+++ b/kernel
Binary files differ