move "state" to rb_vm_tag.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59159 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
move "state" to rb_vm_tag.
Lifetime of "state" should be same as current tag.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59159 b2dd03c8-39d4-4d8f-98ff-823fe69b080e