xfree86: Implement a test input driver

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
4 jobs for xfree86-driver-emulated-input in 4 minutes and 19 seconds
Status Job ID Name Coverage
  Docker Image
passed #6153208
debian-buster

00:00:10

 
  Build And Test
passed #6153209
autotools

00:04:09

passed #6153210
meson

00:01:28

passed #6153211
meson-noglamor

00:01:19