* test/ruby/test_thread_{cv,queue}.rb: Move under the test/ruby directory.
    and rename TestThread* from Test*.
  * test/test_sync.rb: Move toplevel of test diretory because sync is still
    standard library.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64137 b2dd03c8-39d4-4d8f-98ff-823fe69b080e