Update res/values-pt-rBR/strings.xml

[thi747]

Was trying to root my device but I've seen so many portuguese mistakes. It seems like it was made on a poor translator. A lot of words were written for pt-pt instead of pt-br (even though they should write like brazilian now because of a new agreement) Some expressions were just impossible to understand. I really didn't understand what the string updater_cool meant. I hope you use this new translation I made... It took me some time... I nearly changed almost every string, but now, I believe it will help a lot of users Regards