Add linux-kernel freestanding

contrib/linux-kernel/test/include/linux/limits.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2016-2020, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
+ * You may select, at your option, one of the above-listed licenses.
+ */
+#ifndef LINUX_LIMITS_H
+#define LINUX_LIMITS_H
+
+#include <limits.h>
+
+#endif