compositor-fbdev: give the output a name
compositor-fbdev: give the output a name

If you have devices configured in seats with udev then the output names
are tested with string compare.  This fixes a potential crash on startup and
device insertion.

Signed-off-by: Derek Foreman <2f97e0f0bc172406aab8ccd42dab54c95bab8759@osg.samsung.com>
Reviewed-by: Pekka Paalanen <0f6ae7001e34c37b02fb2c1c2573ddf8f442136a@collabora.co.uk>

jonnylamb/weston,jonnylamb/weston,Fantu/compositor-spice,mchalupa/weston,sir-murray/weston,krezovic/weston,eyolfson/weston,Tarnyko/weston-xdg_surface_present,udoprog/weston,Fantu/compositor-spice,Gnurou/weston,giucam/weston,sir-murray/weston,xorgy/weston,Fantu/compositor-spice,mchalupa/weston,krezovic/weston,kwm81/weston,kwm81/weston,Tarnyko/weston-xdg_surface_present,giucam/weston,eyolfson/weston,udoprog/weston,Gnurou/weston,xorgy/weston