* test/ruby/enc/test_case_mapping.rb: Add method test_reorder_unfold to test against
  problems when reordering codepoints in some entries in
  CaseUnfold_11_Type CaseUnfold_11_Table.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56968 b2dd03c8-39d4-4d8f-98ff-823fe69b080e