No native name is displayed for RTL languages in the languages dropdown

The languages dropdown on q=admin/settings/language/add contains a list of predefined languages.

Some examples for the items you will find in this dropdown:

...............
Abkhazian (аҧсуа бызшәа)
Afar
Afrikaans
Akan
Albanian (Shqip)
Amharic (አማርኛ)
Arabic
Armenian (Հայերեն)
...............

However, note that for Arabic the native name of the language is not displayed in parentheses (although it is provided somewhere). The same is true for Hebrew and any other language that has a language-direction defined for it in _locale_get_predefined_list().

The attached patch fixes that.