Adding an os.unlink() call to remove the outfile results in an exception
being thrown if the file does not exist. Fix this by trapping, and
checking for the specific error we get on a missing file.
Signed-off-by: David Brown <david.brown@linaro.org>
This full.bin target demonstrates how to assemble all of the images into
a single file which can be flashed to the device. As it is, it will
then boot into the first "primary" image. The second image will be
present, but will not ever be run.
Signed-off-by: David Brown <david.brown@linaro.org>