safe_hook_execdir buffer overflow

[Joungkyun]

diff -urNp php_execdir.c.orig php_execdir.c
--- php_execdir.c.orig  2016-06-20 01:54:41.000000000 +0900
+++ php_execdir.c       2016-06-20 01:54:59.000000000 +0900
@@ -221,7 +221,7 @@ static int safe_hook_execdir (void) {
                 * Rename original function gets postfie '_orig'
                 */
                {
-                       char            func_re[16] = { 0 };
+                       char            func_re[32] = { 0 };
                        int             func_relen;
                        zend_function * zf;
 #if PHP_VERSION_ID < 60000