Auxfw sync: Move auxfw specific tests to a new file

BUG=b:143094352
BRANCH=none
TEST=make clean && make runtests

Change-Id: I3665bfb10c66e2fbe3906e99cc72346748123cfb
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1873879
Reviewed-by: Julius Werner <jwerner@chromium.org>
3 files changed