wic:generic:x86-64: Update kernel cmdline parameter when bootlower with grub#581

masami256 wants to merge 2 commits intomiraclelinux:emlinux3miraclelinux/meta-emlinux:emlinux3from

masami256:grub-boot-cmd-updatemasami256/meta-emlinux:grub-boot-cmd-updateCopy head branch name to clipboard