more scripts to build with older protobuf

sbuild-pb

+sbuild --extra-repository='deb http://deb.debian.org/debian experimental main' --extra-repository='deb http://incoming.debian.org/debian-buildd/ buildd-unstable main' --extra-repository='deb http://incoming.debian.org/debian-buildd/ buildd-experimental main' --extra-repository='deb http://HTTPS////people.debian.org/~praveen/protobuf-3.8/ experimental main' --extra-repository-key=$HOME/forge/debian/praveen.key.asc --build-dep-resolver=aptitude -d experimental $@

sync-protobuf-3.8

+rsync -av --progress --inplace --delete . people.debian.org:public_html/protobuf-3.8/