[t/spec] rewrite exit.t with Test::Util
[t/spec] rewrite exit.t with Test::Util

git-svn-id: 53605643c415f7495558be95614cf14171f1db78@31126 c213334d-75ef-0310-aa23-eaa082d1ae64

laben/roast,skids/roast,zostay/roast,zostay/roast,niner/roast,dankogai/roast,laben/roast,niner/roast,dogbert17/roast,perl6/roast,dogbert17/roast,dankogai/roast,b2gills/roast,laben/roast,b2gills/roast,cygx/roast,b2gills/roast,zostay/roast,skids/roast,cygx/roast,bitrauser/roast,niner/roast,skids/roast,bitrauser/roast,cygx/roast,dankogai/roast