This avoids inconsistencies between the LITEST_ enum value and the
shortname but also makes it easier to grep for any test cases that use
the same define. At the cost of the test names not looking very nice
anymore but oh well.
Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1157>
Problem: it's still not a 100% check because the way real udev handles the
EVDEV_ABS overrides ignores any that are set through udev properties only. So
we manually have to trigger the keyboard builtin for our test device which
can give us false positives (e.g. it wouldn't have detected #424). But still,
it'll alert us if the actual overridden values are different to what we
expect.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>