Update toolchain
Revert "Fix for apps crashes due to a kernel bug in net"

This reverts commit 6613b4b774524423d7efe0668bfa35a92bb73141.
Handle 'sk' being NULL in UID-based routing.

Bug: 15413527
Change-Id: If33bebb7b52c0ebfa8dac2452607bce0c2b0faa0
Signed-off-by: Sreeram Ramachandran <sreeram@google.com>