[S] Change in coreboot[master]: Makefile: Add targets to add and remove symlinks

[Felix Held (Code Review)]

Attention is currently required from: Christian Walter.

Felix Held has posted comments on this change by Christian Walter. ( https://review.coreboot.org/c/coreboot/+/65093?usp=email )

Change subject: Makefile: Add targets to add and remove symlinks
......................................................................

Patch Set 17:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/65093/comment/31eb1dc9_e5e4d6b7?usp... :
PS5, Line 11: to e.g. develop a new SoC completely seperated from the tree.
> Done

using site-local to keep not yet public soc and mainboard support (possibly using submodule) sounds like a significantly better idea than using symlinks which i'd consider a rather bad and probably avoidable practice. since it's probably actively used, it probably won't be easy to get rid of this questionable mechanism again :(