Add dummy cmake test for enginio.

The create_cmake.prf will check for the existence of the unit
test, but the enginio files are known to be broken. Skip them
as an exeption.

Change-Id: I57aa7d0f61ad689a5c2d349a0bd4ad25111a9138
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>