[coreboot-gerrit] Change in coreboot[master]: libpayload: Add mock assert support for unit testing purposes

[Julius Werner (Code Review)]

Attention is currently required from: Jakub Czapiga.
Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59495 )

Change subject: libpayload: Add mock assert support for unit testing purposes
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Patch Set 1: Code-Review+2