[S] Change in flashrom[master]: libflashrom: Define macro to detect v1.3 header

[Evan Benn (Code Review)]

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

Evan Benn has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/70027 )

Change subject: libflashrom: Define macro to detect v1.3 header
......................................................................

Patch Set 1:

(1 comment)

Patchset:

PS1:
> I talked to aklm about unblocking the release. […]

I'm not against doing it this way, but I'm wondering how this gets used. Do we keep this macro forever? or drop it at v1.4 and add a v1.4 macro?

It seems like I as a library user might want to know something like; version is at least 1.4, or version is between 1.5 and 1.6. That sounds complicated with a symbolic macro like this.

`__STDC_VERSION__` is a case study, it is defined to a number (date), so I can test 
`#if __STDC_VERSION__ > 202201`

Maybe we could do `#define LIBFLASHROM_VERSION` $MAJOR$MINOR?