imlib2: update license
- Use SPDX short identifier (Imlib2) instead of full name
- Add COPYING-PLAIN to license files
- Add hash for license files
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Acked-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit e29fcc14809dcd34f2bccc0fb949ee2cd46489ef)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>