php: bump version to 7.1.5

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/php/php.hash

@@ -1,2 +1,2 @@
 # From http://php.net/downloads.php
-sha256 71514386adf3e963df087c2044a0b3747900b8b1fc8da3a99f0a0ae9180d300b  php-7.1.4.tar.xz
+sha256 d149a3c396c45611f5dc6bf14be190f464897145a76a8e5851cf18ff7094f6ac  php-7.1.5.tar.xz

package/php/php.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PHP_VERSION = 7.1.4
+PHP_VERSION = 7.1.5
 PHP_SITE = http://www.php.net/distributions
 PHP_SOURCE = php-$(PHP_VERSION).tar.xz
 PHP_INSTALL_STAGING = YES