[S] Change in coreboot[master]: Add support for rust

[Paul Menzel (Code Review)]

Attention is currently required from: Martin L Roth, ron minnich, Elyes Haouas.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74124 )

Change subject: Add support for rust
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Patch Set 1:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/74124/comment/ac742c31_0cb15c70 
PS1, Line 7: Add support for rust
Please add prefix: *util/crossgcc* or *crossgcc*.

https://review.coreboot.org/c/coreboot/+/74124/comment/2f7cc383_ca8b080e 
PS1, Line 9: This is what is done on oreboot. It is not clear
           : that the four commands in the rule are strictly
           : necessary.
Nit: Please use the fully allowed width of 72 characters. Then it fits into two lines.

Patchset:

PS1: 
Before we add support for another language, could you please bring this up on the mailing list?