Code review comment for lp:~elopio/snappy/normalize_test

Thanks for catching that federico.

ogra and sergio confirmed that the dtbs is required on our uboot devices, so I added that condition.
I know you said you didn't like the if, but the other alternatives are checking that there doesn't exist a file with a name like vmlinuz.* or initrd.img.*, and I didn't like how that code looked.

Let me know what you think, and if you are against the if I'll get the other check.