Android UCI engine update: McBrain 2017.2.5b.ACH

Thanks to Alexei for compiling this McBrain version. McBrain is a tweaked Stockfish, maintained by Micheal Byrne. You can read more about it HERE.

GET McBrain 2017.2.5b.ACH for arm7

In case of trouble downloading from your PC, use your mobile device or refer to THIS POST.