[trusty] ACPI / video: Change the default for video.use_native_backlight to 1

[Yidi Lin]

BugLink: https://bugs.launchpad.net/bugs/1250401

This patch is committed in v3.16-rc1 which fixes win8 backlight issue.
I had verified this patch for bug #1250401.

This patch also fixes bug #1284030.

commit 751109aad5834375ca9ed0dcfcd85a00cbf872b5
Author: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Date:   Thu Jun 5 22:47:35 2014 +0200

    ACPI / video: Change the default for video.use_native_backlight to 1

    Now that we're hoping to have resolved all of the problems with
    video.use_native_backlight=1, make that the default at last.

    Link: http://marc.info/?l=linux-acpi&m=139716088401106&w=2
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>