Android UCI engine update: Octochess r4995.JA & r6556.JA

The search goes on toward a solid rock Android compile of Octochess. Jim Ablett has just compiled two more alternatives, of which one at least should work flawlessly.

Octo is originally a multi thread capable engine on PC but it seems it had specific flaws under Android so far as previous compiles didn't work on my Arm7 devices, although i could configure the number of cores and even run the engine. Unfortunately, it kept failing during test games.

The latest compiles are r4995 with multicore enabled and r6556 with multicore disabled. Try both and take the one that suits your case.