dist: statically link to libstdc++ on Ubuntu
dist: statically link to libstdc++ on Ubuntu

Fixes #494

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

scylladb/scylla,duarten/scylla,raphaelsc/scylla,duarten/scylla,avikivity/scylla,duarten/scylla,kjniemi/scylla,raphaelsc/scylla,kjniemi/scylla,scylladb/scylla,scylladb/scylla,kjniemi/scylla,scylladb/scylla,avikivity/scylla,avikivity/scylla,raphaelsc/scylla