[coreboot-gerrit] Change in coreboot[master]: intelmetool: Print strerror() results for mmap errors

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Change subject: intelmetool: Print strerror() results for mmap errors
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Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/53177/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/9004/ : SUCCESS