entrypoint.sh: better management of sign key
Created by: OTLabs
You need to remove any old sign key(s) and any repository index file(s) signed with old key(s) before first run of new dabuild as it will use a new static filename for signing key pair:
rm ~/.abuild/*.rsa* # remove any old sign key(s)
find ~/packages/ -name APKINDEX.tar.gz -delete # remove any repository index files signed with old key(s)