[Arista] Ensure the kernel-cmdline-append is initially empty #15343
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Why I did it
The
kernel-cmdline-append
file is not being reset before being generated.Multiple invocations of
build_image.sh
would lead to an ever growing file.How I did it
Truncate the file at the beginning of build_image.sh
How to verify it
No duplicated content in
kernel-cmdline-append
after runningbuild_image.sh
twice.Which release branch to backport (provide reason below if selected)