Change in coreboot[master]: MAKE: MOAAAAAR $$$$$$$$

[Nico Huber (Code Review)]

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/29639 )

Change subject: MAKE: MOAAAAAR $$$$$$$$
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Patch Set 1:
> Is this still needed?

Not literally needed. But I keep it as a reminder that
our cold-cache abuild could be much more efficient:

The dollars would help to have the same entries in
automatically generated .d dependency files even when
the build/ dir changes. But there is more work in
ccache to be done to make this useful.