Require suid bit on audit objects in privileged programs

Backport for 2.11.1.
(cherry-picked from commit 8e9f92e9d5d7737afdacf79b76d98c4c42980508)

BUG=chromium-os:19436
TEST=emerge glibc

Change-Id: I9234597f06aebd2f2769a1c4fde5267967c8fe03
7 files changed