compositor: Emit destroy signal when we manually destroy a weston_surface
compositor: Emit destroy signal when we manually destroy a weston_surface

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