Rework Booster so that it uses the bitstream that it is installing
in order to validate that the new image will actually work.
This removes any sort of binary ABI compatibility issues, and
prevents us from installing an image onto a device that it doesn't
support.
Additionally, this installer should be resistant to bricking, though
that has yet to be tested.
Signed-off-by: Sean Cross <sean@xobs.io>
