[M] Change in flashrom[master]: flashrom_tester: Add positive check to verify_fail_test

[Evan Benn (Code Review)]

Attention is currently required from: Peter Marheine.

Hello build bot (Jenkins), Peter Marheine,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/71974

to look at the new patch set (#8).

Change subject: flashrom_tester: Add positive check to verify_fail_test
......................................................................

flashrom_tester: Add positive check to verify_fail_test

In verify_fail_test test that verify works when expected, as well as
fails when expected. A verify_region_from_file function is added to
support this.

BUG=b:235916336
BRANCH=None
TEST=None

Change-Id: Ibbcc97086466b67cfab4f6c32140bb5f2c456beb
Signed-off-by: Evan Benn 
---
M util/flashrom_tester/flashrom/src/cmd.rs
M util/flashrom_tester/flashrom/src/flashromlib.rs
M util/flashrom_tester/flashrom/src/lib.rs
M util/flashrom_tester/src/tests.rs
4 files changed, 68 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/74/71974/8