signing-script: Modify kernel_config variable name to kernel_cmd_line.

Throughout the signing script, kernel command line is referenced as
kernel_config which is misleading. Hence modify the variable name to
kernel_cmd_line.

BUG=b/240174341
BRANCH=None
TEST=presubmit
RELEASE_NOTE=None

Signed-off-by: Meena Shanmugam <meenashanmugam@google.com>
Change-Id: If804d81c242cb4695cfe2265f6d953a18e3e0719
Reviewed-on: https://cos-review.googlesource.com/c/third_party/platform/vboot_reference/+/37596
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
1 file changed