tests: Add unit test to run init/shutdown for dummyflasher.c

Introduce test to exercise that init and shutdown of drivers
correctly manage the drivers life-time state. We constrain
ourselves to dummyflasher in particular here as it does not need
any mocking.

BUG=b:181803212
TEST=builds and ninja test

Change-Id: I3c0ef73397f00c1db7aabb5f9f00cb43525af29c
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/52497
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
4 files changed