Add missing import

Author: kocsismate

ext/standard/basic_functions.c

@@ -29,6 +29,7 @@
 #include "ext/standard/info.h"
 #include "ext/session/php_session.h"
 #include "zend_exceptions.h"
+#include "zend_attributes.h"
 #include "zend_operators.h"
 #include "ext/standard/php_dns.h"
 #include "ext/standard/php_uuencode.h"