Expose virtual PID from child namespace in /proc/PID/status.

The virtual PID is used by Ubuntu Touch application manager code ( which
runs in the Android namespace ), to communicate with code that runs inside the
Ubuntu container.

This patch is not from upstream.  It was proposed on the lxc-users
mailing list:

http://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg01840.html

Change-Id: If63652002c227827fb524e03a1d0210fc2b7d4b1
Original-Author: Greg Kurz <gkurz@fr.ibm.com>
Signed-off-by: Greg Kurz <gkurz@fr.ibm.com>
Signed-off-by: Tony Espy <espy@canonical.com>
Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Do not ratelimit audit messages. We want to see them all.

Change-Id: I19c29788cc33b0f59e0bdfe04fe67c247239c559
holiday: 4.3 defconfig changes

Change-Id: Iacf1ff72df38b58ee3d2c91ad41b450536775a12
pyramid: 4.3 defconfig changes

Change-Id: I92726af74474b8c5b2da12617a093086aded52d9
shooter: auto-update defconfig
shooter: enable selinux support
Revert "pyramid: 4.3 defconfig changes"

This reverts commit 7596b80ade1379c8f3491e4fcc6ca7dd6017da39.
Revert "holiday: 4.3 defconfig changes"

This reverts commit d3dbcaaac8758036f3ed67918b3e68553476a967.