sg3_utils: new package

[Peter: rename to sg3-utils, invert package license logic]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>