php: security bump to version 5.6.10

Fixes:
CVE-2015-3414, CVE-2015-3415, CVE-2015-3416 (via bundled sqlite
upgrade).
CVE-2015-2325, CVE-2015-2326 (via bundled pcre upgrade).

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