clients: Fork clickdot as confine

The new confine client will be used to demonstrate pointer confinement.
It is so far identical to clickdot except that it doesn't respond to
clicks.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Acked-by: Daniel Stone <daniels@collabora.com>
2 files changed