Change in coreboot[master]: Remove libverstage as separate library and source file class

[build bot (Jenkins) (Code Review)]

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Change subject: Remove libverstage as separate library and source file class
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Patch Set 15:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/50892/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/6867/ : SUCCESS