new package: add package 'xorg-launch-helper'
xorg-server: start via xorg-launch-helper

services that depend on Xorg (such as ratpoison/xbmc)
should wait with starting until Xorg is ready for X11 connections

xorg-launch-helper is a simple solution. it starts and forks the
Xorg server and listens for a signal from Xorg. At this point, the
utility signals systemd READY through sd_notify(). At this point
systemd will start units that have an explicit ordering configured
to be after the xorg.service

...
Oct 10 12:03:36 openelec systemd[1]: Reached target Multi-User System.
Oct 10 12:03:36 openelec systemd[1]: Starting Xorg Server...
Oct 10 12:03:39 openelec systemd[1]: Started Xorg Server.
Oct 10 12:03:39 openelec systemd[1]: Starting Ratpoison Window Manager...
Oct 10 12:03:39 openelec systemd[1]: Started Ratpoison Window Manager.
Oct 10 12:03:39 openelec systemd[1]: Starting Graphical Interface.
Oct 10 12:03:39 openelec systemd[1]: Reached target Graphical Interface.
Oct 10 12:03:39 openelec systemd[1]: Starting XBMC user autostart script...
Oct 10 12:03:39 openelec systemd[1]: Started XBMC user autostart script.
Oct 10 12:03:39 openelec systemd[1]: Starting XBMC Media Center...
Oct 10 12:03:39 openelec systemd[1]: Started XBMC Media Center.
Oct 10 12:03:39 openelec systemd[1]: Starting XBMC Mediacenter Interface.
Oct 10 12:03:39 openelec systemd[1]: Reached target XBMC Mediacenter Interface.
Oct 10 12:03:39 openelec systemd[1]: Startup finished in 2.556s (kernel) + 5.194s (userspace) = 7.750s.
...
ratpoison: disable history
readline: convert to new package format.
file: convert to new package format.
readline: cleanup
eventlircd: fix udev rules. no whitespace allowed here
Revert "xorg-server: fix udev rule to work with drivers as modules or statically builtin"

This reverts commit 7793693d02c121d5dcff0d74aaa04816d074cf3f.

before:
Oct 11 09:36:18 openelec Xorg[267]: creating needed directories and symlinks for driver: i915
Oct 11 09:36:18 openelec Xorg[268]: creating needed directories and symlinks for driver: radeon
Oct 11 09:36:18 openelec Xorg[463]: creating needed directories and symlinks for driver: nvidia
^^ I have only nvidia.

now:
Oct 11 09:54:30 openelec Xorg[485]: creating needed directories and symlinks for driver: nvidia

this is a regression. don't touch it before we compile ALL drm kernel drivers as modules.
systemd: fix clock rules
xorg: fix configure on multi-gpu setups.

no more than one xorg-configure@ should be allowed. so pick the first card

this hardly depends on current xorg udev rules (see commit a4b62c0017)
or on all drm drivers built as modules.
scripts/autoreconf: prepare to clean up per-package autoreconf hacks
libmad: clean up autoreconf hacks
yaml: convert to new package format.
lockdev: convert to new package format.
libass: convert to new package format.
clean up unneeded configure opts
util-macros: convert to new package format.
lockdev: ups. fix toolchain install
libffi: convert to new package format.
glu: convert to new package format.