release.sh: Sign output conditionally
release.sh: Sign output conditionally

Add the same check that's in build-debian.sh

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>

mtmiller/stoken,mtmiller/stoken,cernekee/stoken,mtmiller/stoken,cernekee/stoken,mtmiller/stoken,cernekee/stoken,cernekee/stoken