Android UCI engine update: Cichess 1.8.20170826.ACH

Two different builds of Cichess compiled by Alexei.

GET Cichess 1.8.20170826.ACH for arm7 and arm8
GET Cichess 1.8a.20170826.ACH for arm7 and arm8

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