Some more strings

[Matthew East]

> For pt_BR:

Hi there, Sorry if it wasn't made clear but we needed the translations
for the languages for which we already have the full documents
translated. There is currently no translation of pt_BR of the
release-notes or about-ubuntu documents.

However, on a more positive note, there are just pt translations of
them, and we have received all the necessary strings for that, so it
should be ok for hoary.

Thanks, Matt