[PATCH v3 5/5] tools: Update to use 'hasher'

[Daniel Axtens]

Hi,

>      local hash
> -    hash=$(git show -C $1 | python $PWDIR/parser.py --hash)
> +    hash=$(git diff "$1~..$1" | python $pwpath/hasher.py)

Does this function appropriately in the presence of merge commits? ISTR
they had interesting behaviour and there was a difference between using
~ and using ^, and I just wanted to flag that for consideration...

Regards,
Daniel