[coreboot-gerrit] Change in coreboot[master]: util/lint: update checkpatch & spelling.txt to upstream versions

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Change subject: util/lint: update checkpatch & spelling.txt to upstream versions
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Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/15848/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/60646/ : SUCCESS