buildroot

postgresql: security bump to version 9.4.2

Fixes:
CVE-2015-3165 (denial of service)
CVE-2015-3166 (information disclosure)
CVE-2015-3167 (side-channel key exposure)

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>