Fix operator precedence in the skip section of readonly tests

Author: kocsismate

Zend/tests/readonly_props/readonly_clone_error1.phpt

@@ -2,7 +2,7 @@
 Readonly property cannot be reset twice during cloning
 --SKIPIF--
 <?php
-if (function_exists('opcache_get_status') && opcache_get_status()["jit"]["enabled"] ?? false) {
+if (function_exists('opcache_get_status') && (opcache_get_status()["jit"]["enabled"] ?? false)) {
     die('skip Not yet implemented for JIT');
 }
 ?>

Zend/tests/readonly_props/readonly_clone_success1.phpt

@@ -2,7 +2,7 @@
 Readonly property can be reset once during cloning
 --SKIPIF--
 <?php
-if (function_exists('opcache_get_status') && opcache_get_status()["jit"]["enabled"] ?? false) {
+if (function_exists('opcache_get_status') && (opcache_get_status()["jit"]["enabled"] ?? false)) {
     die('skip Not yet implemented for JIT');
 }
 ?>

Zend/tests/readonly_props/readonly_clone_success3.phpt

@@ -2,7 +2,7 @@
 __clone() can indirectly modify unlocked readonly properties
 --SKIPIF--
 <?php
-if (function_exists('opcache_get_status') && opcache_get_status()["jit"]["enabled"] ?? false) {
+if (function_exists('opcache_get_status') && (opcache_get_status()["jit"]["enabled"] ?? false)) {
     die('skip Not yet implemented for JIT');
 }
 ?>