Crash is caused because we're trying to use cgroups on an unsupported kernel

Landed this change which should fix the issue:

https://chromium-review.googlesource.com/c/chromiumos/platform2/+/1150728

cgroups are not available in kernel version 3.8 which was resulting in the crash in minijail.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/d8d25f905a4649339d0ac6a15a8920a2bd9fab5b

commit d8d25f905a4649339d0ac6a15a8920a2bd9fab5b
Author: David Valleau <valleau@chromium.org>
Date: Sat Aug 04 09:00:02 2018

ippusb_manager: Adding chmod call to init script to ensure group access

After changing debugd to create the "/run/ippusb" directory
(https://crrev.com/c/1155968), the directory gets created before the
ippusb init scripts begin running. This change adds a chmod call to the
init scripts to ensure that the directory allows group access.

BUG= chromium:866144 
TEST=Tested manually on device

Change-Id: Iea57731be09eafb4a6773a0f843ed69e7f86f038
Reviewed-on: https://chromium-review.googlesource.com/1161615
Commit-Ready: David Valleau <valleau@chromium.org>
Tested-by: David Valleau <valleau@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/d8d25f905a4649339d0ac6a15a8920a2bd9fab5b/ippusb_manager/etc/init/ippusb-pre-upstart-socket-bridge.conf

I have tested that these changes on one of the latest images (R70-10944.0.0) from Goldeneye and everything works correctly.

If possible I would like to have them picked back into M69 as they fix crashes that users would experience when trying to print. These are small changes that should not have an impact on any other systems.

This bug requires manual review: M69 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), kariahda@(iOS), cindyb@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Merge approved, M69.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/539c760f114425b88b75d7160a7668ac591b320e

commit 539c760f114425b88b75d7160a7668ac591b320e
Author: David Valleau <valleau@chromium.org>
Date: Thu Aug 09 22:33:18 2018

ippusb_manager: Adding chmod call to init script to ensure group access

After changing debugd to create the "/run/ippusb" directory
(https://crrev.com/c/1155968), the directory gets created before the
ippusb init scripts begin running. This change adds a chmod call to the
init scripts to ensure that the directory allows group access.

BUG= chromium:866144 
TEST=Tested manually on device

Change-Id: Iea57731be09eafb4a6773a0f843ed69e7f86f038
Reviewed-on: https://chromium-review.googlesource.com/1161615
Commit-Ready: David Valleau <valleau@chromium.org>
Tested-by: David Valleau <valleau@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
(cherry picked from commit d8d25f905a4649339d0ac6a15a8920a2bd9fab5b)
Reviewed-on: https://chromium-review.googlesource.com/1169923
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: David Valleau <valleau@chromium.org>

[modify] https://crrev.com/539c760f114425b88b75d7160a7668ac591b320e/ippusb_manager/etc/init/ippusb-pre-upstart-socket-bridge.conf

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/7e0f8e5deb42656856a20c5953a26452c3e115b6

commit 7e0f8e5deb42656856a20c5953a26452c3e115b6
Author: David Valleau <valleau@chromium.org>
Date: Thu Aug 09 22:33:22 2018

ippusb_manager: Removing use of cgroups

Devices with kernel 3.8 do not support cgroups which was causing crashes
in minijail_enter(). This change removes the use of cgroups until
devices with 3.8 reach EOL.

BUG= chromium:866144 
TEST=Tested manually on device

Change-Id: I5122666767a519221d0f819508cb214fb735f219
Reviewed-on: https://chromium-review.googlesource.com/1150728
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: David Valleau <valleau@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
(cherry picked from commit ff06da0ea49ff9c0cd4820ad2cb0ec91d40bd3a4)
Reviewed-on: https://chromium-review.googlesource.com/1169922
Commit-Queue: David Valleau <valleau@chromium.org>

[modify] https://crrev.com/7e0f8e5deb42656856a20c5953a26452c3e115b6/ippusb_manager/ippusb_manager.cc

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

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