[coreboot-gerrit] Change in coreboot[master]: util/abuild: Fix building when not in coreboot root dir

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/27095 )

Change subject: util/abuild: Fix building when not in coreboot root dir
......................................................................

Patch Set 2: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/28982/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/74880/ : SUCCESS