package/snappy: bump to version 1.2.1
Release notes:
https://github.com/google/snappy/releases/tag/1.2.1
https://github.com/google/snappy/releases/tag/1.2.0
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>