tests/futility/test_show_and_verify: Add test cases for kernel vblocks The output of 'futility show' is slightly different for a kernel partition and kernel vblock. Therefore, add two test cases for the latter. BUG=none TEST=make runfutiltests BRANCH=none Change-Id: I0af057982aeab890abcf3e40fa2816f210a07d18 Signed-off-by: Yu-Ping Wu <yupingso@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/5042017 Reviewed-by: Julius Werner <jwerner@chromium.org>