Add a simple program that allows to test the new LINECHANGED_FD ioctl().
Signed-off-by: Bartosz Golaszewski Reviewed-by: Andy Shevchenko
gpio-utils-y += gpio-utils.o lsgpio-y += lsgpio.o gpio-utils.o gpio-hammer-y += gpio-hammer.o gpio-utils.o gpio-event-mon-y += gpio-event-mon.o gpio-utils.o gpio-watch-y += gpio-watch.o