install-dependencies.sh: add snappy
install-dependencies.sh: add snappy

avikivity/scylla,scylladb/scylla,duarten/scylla,duarten/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla