This simulates an output removal which should trigger a crash when
the compositor is shutdown abruptly by having a view with a listener installed
on its output_destroy signal.
This patch assumes that weston_compositor_remove_output() has already
been amended to use the more safer version for triggering signal
emission.
As both shells use this construct it should catch any potential signal
corruption.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
