xserver-xorg upgrade

The last commit does three things:
* removes xf86-video-modesetting recipe
* upgrades xserver-xorg (which now includes modesetting driver)
* updates OELAYOUT_ABI (to avoid sanity check freaking out from the previous two)
The combination seems logically atomic to me but let me know if I should divide it into separate commits instead.

Also, I'm not totally familiar with the tmp/sysroots/ layout so would appreciate advice on the sanity.bbclass changes.

First commit fixes a sanity.bbclass bug that would be triggered by the actual patch.

I've tested the ABI upgrade to the best of my ability (including wiping tmp/, building an image from master, then building this branch).

The following changes since commit 16caaabfcc678b03a0cd88aaeac15f9b8d1c3dad:

bitbake: bitbake-user-manual-customization.xsl: Pointing to mirrors for XSL files. (2015-05-19 22:09:36 +0100)

are available in the git repository at:

git://git.yoctoproject.org/poky-contrib jku/xorg
http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=jku/xorg

Jussi Kukkonen (2):
sanity.bbclass: import subprocess in correct function
xserver-xorg: Upgrade 1.16.3 -> 1.17.1 (OELAYOUT_ABI change)

 meta-yocto/conf/distro/poky.conf                   |   2 +-
 meta/classes/sanity.bbclass                        |  10 +-
 meta/conf/abi_version.conf                         |   2 +-
 .../xorg-driver/xf86-video-modesetting_0.9.0.bb    |   8 --
 .../recipes-graphics/xorg-xserver/xserver-xorg.inc |   9 +-
 ...Check-strings-length-against-request-size.patch | 145 ---------------------
 ...wap-XkbSetGeometry-data-in-the-input-buff.patch | 109 ----------------
 .../Fix-subwindow-in-Xi-emulated-events.patch      |  41 ------
 .../xserver-xorg/xshmfence-option.patch            |  57 --------
 ...erver-xorg_1.16.3.bb => xserver-xorg_1.17.1.bb} |   8 +-
 10 files changed, 19 insertions(+), 372 deletions(-)
 delete mode 100644 meta/recipes-graphics/xorg-driver/xf86-video-modesetting_0.9.0.bb
 delete mode 100644 meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-xkb-Check-strings-length-against-request-size.patch
 delete mode 100644 meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-xkb-Don-t-swap-XkbSetGeometry-data-in-the-input-buff.patch
 delete mode 100644 meta/recipes-graphics/xorg-xserver/xserver-xorg/Fix-subwindow-in-Xi-emulated-events.patch
 delete mode 100644 meta/recipes-graphics/xorg-xserver/xserver-xorg/xshmfence-option.patch
 rename meta/recipes-graphics/xorg-xserver/{xserver-xorg_1.16.3.bb => xserver-xorg_1.17.1.bb} (74%)

2.1.4