[coreboot-gerrit] Change in coreboot[master]: (test)lz4/lib: use 'std=c17'

[Julius Werner (Code Review)]

Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/44194 )

Change subject: (test)lz4/lib: use 'std=c17'
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Patch Set 1: Code-Review-1

This code is imported verbatim from LZ4's GitHub, so let's not touch it unless necessary.