termina_build_image: use bzImage kernel on x86_64

After CL:1609969, crosvm can now boot bzImage kernels directly.

Modify termina_build_image to use the bzImage-format kernel from the
original board image directly rather than extracting the decompressed
ELF kernel.

TEST=deploy_termina and boot Crostini

Change-Id: I306144d7e74f8a5c86929e64bfb23102bcddf7d5
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1615616
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
1 file changed