vboot/ui/tests: Fix struct compare error in unit tests

Use packed structures to avoid unexpected error about padding.

BUG=b:156448738, b:170186754
BRANCH=none
TEST=CC=x86_64-pc-linux-gnu-clang;
     make clean && make runtests
TEST=FEATURES=test PKGDIR=/build/puff/test-packages
     /mnt/host/source/chromite/bin/parallel_emerge
     --sysroot=/build/puff --jobs=32 vboot_reference

Signed-off-by: Hsuan Ting Chen <roccochen@chromium.org>
Change-Id: Ibdcffe81d92db2880c53282a313ffa678af7d43d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2454911
Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>
2 files changed