Ruby

• parse.y (parser_tokadd_utf8, parser_tokadd_string): allow NUL
  containing symbol literals, as well as String#to_sym.
  [ruby-dev:41447]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@28084 b2dd03c8-39d4-4d8f-98ff-823fe69b080e