Bug 213920 - add Dockerfile for rpm repackaging r=gabriel,jcristau

Differential Revision: https://phabricator.services.mozilla.com/D239347

taskcluster/docker/rpm-repackage/Dockerfile

@@ -0,0 +1,10 @@
+FROM $DOCKER_IMAGE_PARENT
+MAINTAINER Mozilla Releng <release@mozilla.com>
+
+VOLUME /builds/worker/workspace
+
+ARG TASKCLUSTER_ROOT_URL
+ARG DOCKER_IMAGE_PACKAGES
+RUN /usr/local/sbin/setup_packages.sh $TASKCLUSTER_ROOT_URL $DOCKER_IMAGE_PACKAGES && \
+    apt-get update && \
+    apt-get install -y rpm

taskcluster/kinds/docker-image/kind.yml

@@ -272,6 +272,12 @@ tasks:
         symbol: I(deb12-toolchain)
         parent: debian12-base
         definition: toolchain-build
+    debian12-rpm-repackage:
+        symbol: I(deb12-rpm-rpk)
+        parent: debian12-base
+        definition: rpm-repackage
+        packages:
+            - deb12-mercurial
     android-build:
         symbol: I(agb)
         parent: debian12-base