sdk-image: use systemd-boot instead of gummiboot

Added kernel command line to `filesystem-deploy` action for proper
generation of `/ets/kernel/cmdline` file.

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

apertis-image-sdk.yaml

@@ -69,21 +69,17 @@ actions:
 
   - action: filesystem-deploy
     description: Deploying ospack onto image
+    append-kernel-cmdline: {{ $cmdline }}
 
   - action: apt
     packages:
-      - gummiboot
+      - systemd-boot
 
   - action: run
     description: Install UEFI bootloader
     chroot: true
     command: bootctl --path=/boot/efi install
 
-  - action: run
-    description: Add kernel parameters
-    chroot: true
-    command: sed -i -e 's%GUMMIBOOT_OPTIONS=.*%GUMMIBOOT_OPTIONS="{{ $cmdline }}"%' /etc/default/gummiboot
-
   - action: apt
     description: Kernel and system packages for {{$architecture}}
     packages: