test_io_console.rb: different names

* test/io/console/test_io_console.rb (test_noctty): use different
  names for each tempfiles.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49039 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-12-28

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49040 b2dd03c8-39d4-4d8f-98ff-823fe69b080e