Merge patch series "ut: fix print_guid() and enable UNIT_TEST for qemu_arm64"

Jerome Forissier <jerome.forissier@linaro.org> says:

There is a bug in the print_guid() unit test in test/common/print.c when
PARTITION_TYPE_GUID is not enabled but either CMD_EFIDEBUG or EFI are.

The first patch fixes the issue and the second one enables UNIT_TEST in
the qemu_arm64 defconfig so that the unit tests are run in CI (this
platform has CMD_EFIDEBUG so the bug applies).

Link: https://lore.kernel.org/r/20250416074839.1267396-1-jerome.forissier@linaro.org