01fips: add / in BOOT_IMAGE_HMAC filename for clarity
It's already the case the `BOOT_IMAGE_PATH` today, in the non-empty
case, includes a trailing `/`, but let's add it to the path we build
here too to make it more obvious.
patch_name: 0055.patch
present_in_specfile: true
location_in_specfile: 55
squash_commits: true