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

[Anton Samsonov (Code Review)]

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

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

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

(1 comment)

Patchset:

PS4:
> add testing info in commit message.

Lacking relevant examples in git log, I can only add something like this:

Tested with <getopt.h> and <pci/pci.h> using GNU Make 4.1, 4.2.1, 4.4.1
and Meson 0.56.0, 1.2.1 against GCC 13.2.1 and GCC 5.5-, 7.3-compatible
(EDG 4.14-, 5.1-based) on openSuSE Tumbleweed and custom LFS distribution.

Do you think such information is really worth to be included in the log?