fix the description about non-generated code
fix the description about non-generated code

goadesign/goa-cellar,raphael/goa-cellar,lxgxiong/goa-cellar,raphael/goa-cellar,goadesign/goa-cellar,lxgxiong/goa-cellar,raphael/goa-cellar,lxgxiong/goa-cellar,goadesign/goa-cellar