io.c: IO#reopen int mode
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37041 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io.c: IO#reopen int mode
based on the patch by Glass_saga (Masaki Matsushita) in
[ruby-core:47694]. [Feature #7067]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37041 b2dd03c8-39d4-4d8f-98ff-823fe69b080e