dir.c: relative path Dir base
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
dir.c: relative path Dir base
[Feature #13056]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e