[M] Change in flashrom[master]: [WIP] util/builder/flashrom-sdk: Add Docker image for building flashrom

[Felix Singer (Code Review)]

Attention is currently required from: Nico Huber, Thomas Heijligen, Angel Pons, Anastasia Klimchuk.

Felix Singer has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/67267 )

Change subject: [WIP] util/builder/flashrom-sdk: Add Docker image for building flashrom
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Patch Set 6:

(1 comment)

File util/builder/flashrom-sdk/Dockerfile:

https://review.coreboot.org/c/flashrom/+/67267/comment/8fc18339_5eeef230 
PS6, Line 1: archlinux
> As much as I love Arch Linux, it's rolling release and bleeding-edge: the only version Arch has is ` […]

It's useless anyway. Our Jenkins is not able to handle multiple sorts of containers for historical reasons. We have to wait until CB:67272 is in and the new container is rolled out. So I will abandon this.