Cross testing applications under QEMU

[Michael Hope]

We use QEMU to test programs built by the toolchain binary release for
correctness.  I've written up the instructions for spinning up your
own at:
 https://wiki.linaro.org/MichaelHope/Sandbox/QEMUCrossTest

It's focused on simplicity - getting a running, SSH only Cortex-A9 up
and going as soon as possible.  It's not the latest, not graphical,
and doesn't replace the deeper documentation at:
 https://wiki.linaro.org/Resources/HowTo/Qemu

-- Michael