terminal: Stop complaining about OSC escape code 7
terminal: Stop complaining about OSC escape code 7

This is the current working directory of the shell as an URI.  We
don't use that for anythign at the moment, but let's not complain
about it at least.

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