bzimage_test: Add TestSupportedVersions
bzimage_test: Add TestSupportedVersions

Add testing to ensure that unmarshal fails for unsupported boot protocol versions.

Signed-off-by: Avi Brender <11ee27df373bbd309e6724095478ce22858b8ef0@google.com>

u-root/u-root,u-root/u-root,u-root/u-root