New pt_br translator

AUTHORS

@@ -68,6 +68,7 @@
    Norwegian     Gustav Foseid <gustavf@squirrelmail.org>
    Polish        Lukasz Klimek <casa@lo.pila.pl>
    Portuguese (Brazil) Henrique Moura <henriquemoura@hotmail.com>
+                 Gleydson Mazioli da Silva <gleydson.mazioli@ima.sp.gov.br>
    Portuguese (Portugal) Ruben Leote Mendes <ruben@nocturno.org>
    Romanian      Mircea Ilie <mrx@tep.ro>
    Russian       Konstantin Riabitsev <icon@duke.edu>