Fix OPcache tests under specific conditions

Author: zeriyoshi

ext/opcache/tests/gh9259_003.phpt

@@ -8,6 +8,7 @@ if (getenv('SKIP_ASAN')) die('xfail Leaks memory with ASAN');
 ?>
 --INI--
 opcache.interned_strings_buffer=500
+opcache.enable=1
 opcache.enable_cli=1
 --FILE--
 <?php