HACK, DO NOT SHIP: kernel update (debug umount issue)

Either cherry-pick for A/B build, or revert before shipping,
or take next kernel (which has the revert in it).

3ed3cdb HACK, DO NOT SHIP: Debug unmounting issue

Bug: 16378004
Change-Id: If0929514e4faa47d37d7c4c6c4f4d7019d93235f
diff --git a/kernel b/kernel
index e3a9eaa..0de3739 100644
--- a/kernel
+++ b/kernel
Binary files differ