L10n updates for: pt_BR

From translation svn revision: 27471

Authors:
Cleverson Casarin Uliana <clever97@gmail.com>
Marlin Rodrigues <marlincgrodrigues@yahoo.com.br>

Stats:
813	733	source/locale/pt_BR/LC_MESSAGES/nvda.po
 1 file changed, 813 insertions(+), 733 deletions(-)