[gcc r14-8137] gccrs: Add licence text and change header guard name

[Arthur Cohen]

https://gcc.gnu.org/g:65de922f9bdb52b308430d2ae11b99c2c98db053

commit r14-8137-g65de922f9bdb52b308430d2ae11b99c2c98db053
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Wed Nov 8 10:46:22 2023 +0100

    gccrs: Add licence text and change header guard name
    
    This file was missing a licence text and it's header guard was not
    matching the file name.
    
    gcc/rust/ChangeLog:
    
            * util/rust-attribute-values.h (RUST_ATTRIBUTES_VALUE_H): Remove old
            header guard.
            (RUST_ATTRIBUTE_VALUES_H): Add new one.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/util/rust-attribute-values.h | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/gcc/rust/util/rust-attribute-values.h b/gcc/rust/util/rust-attribute-values.h
index 513550a01ec..b8994da2df9 100644
--- a/gcc/rust/util/rust-attribute-values.h
+++ b/gcc/rust/util/rust-attribute-values.h
@@ -1,5 +1,23 @@
-#ifndef RUST_ATTRIBUTES_VALUE_H
-#define RUST_ATTRIBUTES_VALUE_H
+// Copyright (C) 2020-2023 Free Software Foundation, Inc.
+
+// This file is part of GCC.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with GCC; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#ifndef RUST_ATTRIBUTE_VALUES_H
+#define RUST_ATTRIBUTE_VALUES_H
 
 namespace Rust {
 namespace Values {
@@ -37,4 +55,4 @@ public:
 } // namespace Values
 } // namespace Rust
 
-#endif /* !RUST_ATTRIBUTES_VALUE_H */
+#endif /* !RUST_ATTRIBUTE_VALUES_H */