Destroy the input wayland objects

They are not automatically destroyed by the compositor when the seat
loses them.

Change-Id: I72d45d664948afb4b39f137c91870f21d26dcb4a
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Add missing pkg-config package

The hardware integrations needs to pick up the correct include path

Change-Id: I457028803d3a4086bff53be4aa91417c1b293623
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Make the glx backend compile again

Still needs some renaming and verification, but this makes it compile at least

Change-Id: Ifb7fc68e8705f235bf0edf2ae9bb38274b693d3c
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>