build: Dist box_drawing_generate.sh
build: Dist box_drawing_generate.sh

https://bugzilla.gnome.org/show_bug.cgi?id=730140
(cherry picked from commit ffa42d66a73c66bbda25df5d84b95717be6b1efa)

pjm0616/vte,pjm0616/vte,pjm0616/vte