Remove useless stuff from "AndroidConfig.h".

The futex wrappers and memcmp16 are no longer available to anyone.
No one was checking for the existence of the SA_NOCLDWAIT constant,
and even if they wanted to, they could just check directly.

Change-Id: If8ac6c2617b76b23a2450f58fc03453f7f82a61f
8 files changed