[L] Change in coreboot[master]: Documentation: Bring back abuild documentation

[Martin L Roth (Code Review)]

Attention is currently required from: Keith Hui, Paul Menzel.

Martin L Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/76775?usp=email )

Change subject: Documentation: Bring back abuild documentation
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Patch Set 4:

(1 comment)

File Documentation/util/abuild/index.md:

https://review.coreboot.org/c/coreboot/+/76775/comment/24028bf5_c887147b :
PS4, Line 4:  
A bunch of trailing whitespace, but after that, I think it's good to go.