[S] Change in flashrom[main]: Remove dependency on C23 __has_include()

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Anton Samsonov, Thomas Heijligen.

Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/77089?usp=email )

The change is no longer submittable: All-Comments-Resolved is unsatisfied now.

Change subject: Remove dependency on C23 __has_include()
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Patch Set 4:

(1 comment)

Patchset:

PS4: 
Sorry for such a long delay in response, but finally I got back to this patch, and wow it looks so much better, thank you! :)

I only want to ask add testing info in commit message. I understand you have tested both makefile and meson, but better have the info in commit message. Also if you have tested on different environments (with or without headers), you can list environments that you tested on.