[flashrom-gerrit] Change in flashrom[staging]: Convert flashrom to git

[Martin Roth (Code Review)]

Martin Roth has posted comments on this change. ( https://review.coreboot.org/19206 )

Change subject: Convert flashrom to git
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Patch Set 1:

Since the jenkins builder always runs in offline mode, I updated it to add:
  git config flashrom.offline-builds true