[tracker-oci-images/sam/ubuntu] Add Ubuntu image for CI

[Sam Thursfield <sthursfield src gnome org>]

commit 59bc3ca32b2d1e3779b861babe8de8b4171284b9
Author: Sam Thursfield <sam afuera me uk>
Date:   Fri Dec 13 22:43:14 2019 +0100

    Add Ubuntu image for CI
    
    This pulls the 'rolling' tag from https://hub.docker.com/_/ubuntu
    which seems to be the latest stable release. The 'latest' tag seems
    to be the latest LTS release, but let's prefer the newest version.

 .gitlab-ci.yml | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8798140..0dbb644 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -47,3 +47,13 @@ fedora:latest:
       DIR: "fedora"
 
     <<: *distro_build
+
+ubuntu:rolling:
+    variables:
+      ARCH: "amd64"
+      DISTRO_NAME: "ubuntu"
+      DISTRO_VER: "rolling"
+      OCI_YML: "ubuntu-rolling.yml"
+      DIR: "debian"
+
+    <<: *distro_build