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

added 2 commits

• 4985a60e - 1 commit from branch master
• 2d8cdca9 - sdk-image: use systemd-boot instead of gummiboot

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merged