Android UCI engine update: Ethereal 8.86 & 8.87

Three more builds by Andy Grant, the author and one ported by Alexei. 3000 ELO is a few steps away for Ethereal.

GET Ethereal 8.86.AG for arm7
GET Ethereal 8.87.AG for arm7
GET Ethereal 8.87.ACH for arm7 and arm8

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