add simple symbols leak checker
This patch adds simple script that compares libinput.sym file to the functions that are marked by LIBINPUT_EXPORT. This script is added to make check target. Signed-off-by:Marek Chalupa <mchqwerty@gmail.com> Reviewed-by:
Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by:
Peter Hutterer <peter.hutterer@who-t.net>