util/docker: Add docker files for coreboot-sdk & jenkins builders

Add the coreboot specific docker configuration files to the coreboot
repo.  These have been copied directly from Patrick's repo where they
had been being stored.

- coreboot-sdk: debian sid with the coreboot toolchain
- coreboot-jenkins-node: built on top of the coreboot-sdk, adds the
pieces required for building everything with the coreboot jenkins
builders.

Change-Id: I8628d4edb298264e814e02e124a8bfb4bc04e0c7
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14830
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/util/docker/coreboot-jenkins-node/authorized_keys b/util/docker/coreboot-jenkins-node/authorized_keys
new file mode 100644
index 0000000..8a35868
--- /dev/null
+++ b/util/docker/coreboot-jenkins-node/authorized_keys
@@ -0,0 +1 @@
+ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA238BmMin79Xl5bo5cqAnzCv+uEdkajz16qu4xV0szX8XgEtyVQZp02aUP3wJGSBA6AqY8UAbWITfUZ7UF5xcTyRl/n38BYPkFuXje1WDtocv/aUNjBfkmSQGMKuyKAveAaWcUCP2esbpDbF0L4J/DRagg9NAndOkXxifPuCsBx1v5aipNnZWWCOIvOVGoxcyAUv29SO0D6ZAgjlHzV9zSdmxtGur9ctp4XAwXgd/VR9O9njXyO1IJOLPOxoRv11D7pyBYpZeEWW5N9Q1WM04A4ozncNieBLloqEZANlMcMEzb82nChkGdO/1Yy7asQmFFd13rIzjybQrLOeuAX6+cw== codeqa@ra