Add Orbot from the github repository

[xyz-nobody]

Hello,

I really like your application it's very useful.

I know it's not a browser but it's still linked :) because it's super convenient to have access to some sites via the Browser :)

We can install it by hand, but it would be so cool to do it with FFUpdater

Could you please add Orbot from the github repository:

https://api.github.com/repos/guardianproject/orbot/releases/latest

Thanks in advance