Issue #1830844 by David Strauss: Fixed MTimeProtectedFastFileStorage...

Issue #1830844 by David Strauss: Fixed MTimeProtectedFastFileStorage permissions setting needs to be more liberal.

core/lib/Drupal/Component/PhpStorage/MTimeProtectedFastFileStorage.php

@@ -101,7 +101,7 @@ public function save($name, $data) {
     $i = 0;
     while (($mtime = $this->getUncachedMTime($directory)) && ($mtime != $previous_mtime)) {
       $previous_mtime = $mtime;
-      chmod($directory, 0300);
+      chmod($directory, 0700);
       // Reset the file back in the temporary location if this is not the first
       // iteration.
       if ($i > 0) {