ecore/drm: Add support for changed libinput API since 0.8

ecore/drm: Add support for changed libinput API since 0.8

We check for libinput 06 or higher. In version 0.8 they got an API break
(hopefully the last one before 1.0) which we did not support so far. I have
seen libinput 0.9 used on gentoo and newer ubuntu systems so we should
definitely support them.

Adding a LIBINPUT_HIGHER_08 define to check for this. So far we have only one
location where we need it. Once there is a libinput 1.0 we should remove the
support for older versions.

http://lists.freedesktop.org/archives/wayland-devel/2015-January/019383.html