Add support for __m128i types in the debugging dumpers

I can't make it display the unsigned char[16] as a string and I have
no clue why. This is all magic to me...

This is good enough anyway

Change-Id: I1d78c01b3baaec8e7d4506552d79a536b573e9a6
Reviewed-by: hjk <hjk121@nokiamail.com>