[coreboot-gerrit] Change in coreboot[master]: util/crossgcc: Add bootstrap-only mode

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Change subject: util/crossgcc: Add bootstrap-only mode
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Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/61059/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/16232/ : SUCCESS

https://qa.coreboot.org/job/coreboot-toolchain/368/ : SUCCESS