[PATCH 0/1] MR4132: configure: Only build Wayland if linux/input.h is present.

[Brendan Shanks (＠bshanks)]

This fixes a build error on FreeBSD, where Wayland libraries/tools might be present but `linux/input.h` is not unless the `evdev-proto` package is installed and `CPPFLAGS=-I/usr/local/include` is set.