Currently the volume-label for the root filesystem partition is a string
wit the following pattern: ad09a287-46a9-4790-ba97-fbbb549e5e96.
Specify the volume-label as "rootfs" to make it easier to identify it.
Suggested-by: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Pierre-Jean Texier <pjtexier@koncepto.io>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>