Install u-boot-menu instead of u-boot-common

u-boot-menu provides similar functionality to our u-boot-common and is
available in debian, so prefer that

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>

apertis-image-uboot.yaml

@@ -94,8 +94,8 @@ actions:
 {{ else }}
       - linux-image-{{$architecture}}
 {{ end }}
-      - u-boot-common
       - btrfs-tools
+      - u-boot-menu
 
   - action: run
     description: "Save installed package status"