[coreboot-gerrit] Change in coreboot[master]: libpayload/lpgcc: Check for `libpayload.config` for in-tree builds

[Nico Huber (Code Review)]

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/48938 )

Change subject: libpayload/lpgcc: Check for `libpayload.config` for in-tree builds
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Patch Set 2:

Thanks for the reviews, Raul!