chronyd: add multiarch images

Change-Id: I49bd970ecbc7a4b1b2fcb37abbc6d506d3e1ee9a

chronyd/Dockerfile

@@ -0,0 +1,5 @@
+FROM debian:stable-slim
+RUN apt-get update && \
+    apt-get -y install chrony && \
+    rm -rf /var/lib/apt/lists/*
+CMD ["/usr/sbin/chronyd", "-d"]

zuul.d/chronyd.yaml

@@ -0,0 +1,34 @@
+- job:
+    name: docker-images:build:chronyd
+    parent: vexxhost-build-docker-image
+    provides: docker-images:image:chronyd
+    vars: &id001
+      docker_images:
+      - context: chronyd/
+        repository: vexxhost/chronyd
+        arch:
+        - linux/amd64
+        - linux/arm64
+    files: &id002
+    - ^chronyd/.*
+- job:
+    name: docker-images:upload:chronyd
+    parent: vexxhost-upload-docker-image
+    provides: docker-images:image:chronyd
+    vars: *id001
+    files: *id002
+- job:
+    name: docker-images:promote:chronyd
+    parent: vexxhost-promote-docker-image
+    vars: *id001
+    files: *id002
+- project:
+    check:
+      jobs:
+      - docker-images:build:chronyd
+    gate:
+      jobs:
+      - docker-images:upload:chronyd
+    promote:
+      jobs:
+      - docker-images:promote:chronyd