8379256: Update GIFlib to 6.1.1

Backport-of: 8b8bb43

Author: Anupam Dev

src/java.desktop/share/legal/giflib.md

@@ -1,9 +1,9 @@
-## GIFLIB v5.2.2
+## GIFLIB v6.1.1
 
 ### GIFLIB License
 ```
 
-The GIFLIB distribution is Copyright (c) 1997  Eric S. Raymond
+= MIT LICENSE
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -25,9 +25,15 @@ THE SOFTWARE.
 
 ---------------------------------
 The below applies to the following file(s):
+giflib/dgif_lib.c
+giflib/gifalloc.c
+giflib/gif_err.c
 giflib/openbsd-reallocarray.c
 
+Copyright (C) 1989 Gershon Elber
 Copyright (C) 2008 Otto Moerbeek <[email protected]>
+Copyright (C) Eric S. Raymond <[email protected]>
+
 SPDX-License-Identifier: MIT
 
 

src/java.desktop/share/native/libsplashscreen/giflib/COPYING

@@ -1,4 +1,4 @@
-The GIFLIB distribution is Copyright (c) 1997  Eric S. Raymond
+= MIT LICENSE
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal