Ruby

test_dln.rb: fix constants

• test/-ext-/win32/test_dln.rb (test_check_imported): use toplevel
  constants explicitly to get rid of constants under the scope.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56245 b2dd03c8-39d4-4d8f-98ff-823fe69b080e