Test binary to consume memory

Consumes the specified amount of MB of memory, and fills it
with some data. Sits around until killed.

The allocated memory does slowly get swapped out though, so
it won't stay at that exact PSS. But it's helpful for forcing
low memory situations.

Change-Id: Ib03ce6252ed5664c7e43ca2479da7fccf4e15330
Fixes: 65640892
Test: memeater 2000
3 files changed