configure.py: add --static-stdc++ to link libstdc++ statically
configure.py: add --static-stdc++ to link libstdc++ statically

This is required to packaging scylla for Ubuntu 14.04LTS, since we are packaging iotune from seastar.

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>
Message-Id: <1456994823-21905-1-git-send-email-4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

dreamsxin/seastar,scylladb/seastar,cloudius-systems/seastar,cloudius-systems/seastar,dreamsxin/seastar,dreamsxin/seastar,avikivity/seastar,scylladb/seastar,avikivity/seastar,kjniemi/seastar,avikivity/seastar,kjniemi/seastar,kjniemi/seastar,scylladb/seastar,cloudius-systems/seastar,syuu1228/seastar,syuu1228/seastar,syuu1228/seastar