Code review comment for lp:~mabac/linaro-image-tools/bug-638384-hwpackforceyes-unneeded

You're right, Mattias. I'd forgotten about that. I think we should do the same for the gpg check indeed, as that code will never be executed because cmd_runner.run() will raise an exception in wait() when the return code of the subprocess is non-zero, which means the print and sys.exit() calls can never be executed.