ruby: security bump to version 2.1.4

Fixes:
CVE-2014-8080 - Denial of service XML expansion

And change default ext/openssl settings WRT CVE-2014-3566.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>