Add COPYING file

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Fix distcheck

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
xf86-input-libinput 0.1.1

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>