[S] Change in flashrom[main]: libflashrom: Add API to enumerate supported programmers

[Peter Marheine (Code Review)]

Attention is currently required from: Anastasia Klimchuk, Dmitry Zhadinets.

Peter Marheine has posted comments on this change by Dmitry Zhadinets. ( https://review.coreboot.org/c/flashrom/+/86921?usp=email )

Change subject: libflashrom: Add API to enumerate supported programmers
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Patch Set 11: Code-Review+2

(1 comment)

Patchset:

PS1:
> One moment please, ```list_programmers_linebreak``` has a different meaning. […]

I would still prefer to to use this API in `list_programmers_linebreak` even though it requires an allocation, but don't feel very strongly about it. If somebody else thinks it's better to avoid those allocations I'm okay with leaving it unchanged too.