Insist that $(LUA) exists when building libextl-mkexports
Insist that $(LUA) exists when building libextl-mkexports

knixeur/notion,raboof/notion,dkogan/notion.xfttest,anoduck/notion,dkogan/notion.xfttest,dkogan/notion.xfttest,dkogan/notion.xfttest,p5n/notion,neg-serg/notion,dkogan/notion,dkogan/notion,neg-serg/notion,raboof/notion,neg-serg/notion,anoduck/notion,p5n/notion,anoduck/notion,p5n/notion,knixeur/notion,neg-serg/notion,raboof/notion,dkogan/notion,p5n/notion,knixeur/notion,anoduck/notion,anoduck/notion,raboof/notion,p5n/notion,dkogan/notion,knixeur/notion,dkogan/notion,knixeur/notion