gitian: don't export in6addr_loopback
gitian: don't export in6addr_loopback

Former-commit-id: e273e4f1bcd281f8a901bd11f136a70b38c2b06f
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin