package/hostapd: security bump to version 2.3

Fix CVE-2014-3686: wpa_cli and hostapd_cli action script execution vulnerability
(http://w1.fi/security/2014-1/wpacli-action-scripts.txt

)

Signed-off-by: Jörg Krause <jkrause@posteo.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>