util/docker/jenkins-node: Allow pip to install packages system-wide

Call pip3 with `--break-system-packages` allowing it to install packages
system-wide. This fixes building the Docker container.

Change-Id: Id093f2c69fec43556c434fbca7b36095a7e6bd97
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74292
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
diff --git a/util/docker/coreboot-jenkins-node/Dockerfile b/util/docker/coreboot-jenkins-node/Dockerfile
index b277efa..7ab703c 100644
--- a/util/docker/coreboot-jenkins-node/Dockerfile
+++ b/util/docker/coreboot-jenkins-node/Dockerfile
@@ -44,8 +44,8 @@
 		python3-pyrsistent \
 		swig \
 	&& apt-get clean \
-	&& pip3 install --upgrade --no-cache-dir pip \
-	&& pip3 install --no-cache-dir  \
+	&& pip3 install --upgrade --no-cache-dir --break-system-packages pip \
+	&& pip3 install --no-cache-dir --break-system-packages \
 		setuptools==58.2.0 \
 		jinja2==3.0.3 \
 		recommonmark===0.5.0 \