565b9d73d5
Commit 2f229c3928be3a removed the code to compute the above-tab keycode and replaced it with a simple constant from linux/input.h. We obviously cannot depend on linux headers on non-linux systems, so provide a fallback definition in that case (which is expected to work assuming the system is using the Xorg xf86-input-keyboard driver). https://bugzilla.gnome.org/show_bug.cgi?id=737135