[translations] romanian translation for Drupal 5

[Jakub Suchy]

> It offers a command line version of what to do. Not sure how to proceed 
> on Windows. Does poedit offer merging of files? I guess it does, but I 
> don't know how. Some googling revealed that there must be a "update from 
> PO file" option. Find it and use that, I guess.

There is a way.
Open ro.po file using poedit (4.7 translation)
Now click Update from POT template in menu and select .pot file from 5.x
Safe updated file as something-something.po

Do this for all instances of 5.x .pot templates