* ruby.c (process_options): convert the real path of the script to locale
encoding if its encoding is not locale (maybe UTF-8) on Windows/OS X.
this change makes the encoding of __dir__ to the same encoding of __FILE__
when the script name is passed from commandline.
* test/ruby/test_options.rb (test___dir__encoding): test for this change.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60300 b2dd03c8-39d4-4d8f-98ff-823fe69b080e