packagegroup-placeholder-component-p1: conditional x11 dependency

* Make conditional X11 dependency only add packagegroup-xserver-ivi
  if x11 is part of DISTRO_FEATURES.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
layer-management: fix xserver error

* Fix X error of failed request: BadMatch (invalid parameter attributes)
  Major opcode of failed request 62 (X_CopyArea)
* Use WITH_FORCE_COPY build flag to prevent error.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
xserver-xorg: add missing X.service systemd script

* Add missing X.service systemd script

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
README.mxgal: rename readme file

* Rename file to provide instructions to build against
  FSL MXGAL graphic backed, it used the distro config
  fsl-ivi-vfb to add mxgal backed support for layer-manager.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
README.x11: add new file instructions

* Add new file instructions for Genivi BSP support
  for iMX6QSabreAuto using LayerManager X11 backed
  and stock meta-ivi poky-ivi-systemd distro conf
  file.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>