Change in coreboot[master]: Make: Move testing into a subdirectory

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/20873 )

Change subject: Make: Move testing into a subdirectory
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Patch Set 2:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/58262/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/13677/ : SUCCESS