fix verification of radio; save radio version read back

The image offset is specified as a raw offset (ignoring any bad
blocks), so we can't seek there by reading that many bytes.

Save the radio data we read and checksummed to the /tmp so we can see
what was read if the checksum is wrong.

Change-Id: Ie855f67932cdcce7c0f2b6772b9531e729fcf9f0
1 file changed