add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/kernel/time/timeconv.c
..
..
@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: LGPL-2.0+
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 /*
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  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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  * This file is part of the GNU C Library.