[tz] Another change on Brazilian DST time

[Paul Eggert]

On 10/4/18 10:00 AM, Fábio Gomes wrote:
>   I'm just not sure if the end date was kept on 3rd Sunday of 
> February, 2019. How is it now?

In tzdb we left the February 2019 transition as it was, which was indeed 
at 00:00 on February 16. Perhaps the presidential decree (whenever it's 
published) will change that transition too; if so, we'll need to update 
tzdb further.