rootless x support

this patch set add the rootless X support (a.k.a non-root X)

- What is rootless X
Rootless X allow X to be runed with non-root user, to gain better security Rerence (https://wiki.ubuntu.com/X/Rootless) has more detailed info on this.

- What changes are made to support rootless X
To support rootless X, whole stack including kernle, graphics driver, x server and userspace setting are all required to change. Fortunately, the former three already has required changes in upstream, so this patchset only add userspace setting to enalbe the rootless X.

- How to enable/disable rootless X
Not all machine support rootless X currently, because rootless X requires kernel mode setting (KMS) in graphics driver and not all graphics driver support KMS, so a per-machine config "ROOTLESS_X" is introduced to enable/disable rootless X. so far, ROOTLESS_X is set for atom_pc machine, because its graphics driver(intel graphics driver) support KMS well.

this patchset has been tested in atom-pc and qemux86 machine poky-image-sato image

Pull URL: git://git.pokylinux.org/poky-contrib.git
Branch: kyu3/nonrootx
Browse: http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=kyu3/nonrootx

Thanks,
Yu Ke <[email protected]>
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Yu Ke (2):
xf86-video-intel: add config option to support rootless X
xserver-nodm-init: add rootless-x support

 meta/conf/machine/atom-pc.conf                     |    2 +
 .../x11-common/xserver-nodm-init.bb                |   22 +++++++++++++++++++-
 .../x11-common/xserver-nodm-init/Xusername         |    1 +
 .../x11-common/xserver-nodm-init/xserver-nodm      |    4 +++
 .../xorg-driver/xf86-video-intel_2.14.0.bb         |    5 ++++
 5 files changed, 33 insertions(+), 1 deletions(-)
 create mode 100644 meta/recipes-graphics/x11-common/xserver-nodm-init/Xusername