[M] Change in flashrom[master]: tests: Add selfcheck to unit tests

[Evan Benn (Code Review)]

Attention is currently required from: Felix Singer, Thomas Heijligen, Edward O'Callaghan, Anastasia Klimchuk.

Evan Benn has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/69620 )

Change subject: tests: Add selfcheck to unit tests
......................................................................

Patch Set 7:

(1 comment)

File tests/well_formed_tables.c:

https://review.coreboot.org/c/flashrom/+/69620/comment/291c2a76_9868dc5b 
PS6, Line 24: 	do {                                                                                   \
            : 		if (!(assertion))                                                              \
            : 			fail_msg(#assertion " is false for index:%zu name:%s", (index),        \
            : 				 (name) ? (name) : "unknown");                                 \
            : 	} while (0)
> Didn't think of that. […]

I agree that would be the preferred style but a macro is used so that the __LINE__ format used by fail_msg points to the location of the assertion, not the function