php: security bump to version 5.3.15

Fix for CVE-2012-2688 (potential overflow in _php_stream_scandir),
CVE-2012-3365 (SQLite open_basedir bypass) and other misc bugfixes.

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

package/php/php.mk

@@ -4,7 +4,7 @@
 #
 #############################################################
 
-PHP_VERSION = 5.3.14
+PHP_VERSION = 5.3.15
 PHP_SOURCE = php-$(PHP_VERSION).tar.bz2
 PHP_SITE = http://www.php.net/distributions
 PHP_INSTALL_STAGING = YES