ci: build universal macos packages instead of x86_64 only

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-ci/-/merge_requests/408>

gitlab/ci_template.yml

@@ -1115,6 +1115,40 @@ build cerbero macos x86_64:
   rules:
     - if: '$CI_PROJECT_NAME !~ /^(cerbero|gst-build|gst-docs|gst-omx|gst-sharp|gstreamer-vaapi|gst-integration-testsuites|gst-plugins-rs)$/'
 
+#
+# Cerbero macOS Universal build
+#
+.cerbero cross-macos universal:
+  variables:
+    ARCH: "darwin_universal"
+    CONFIG: "cross-macos-universal.cbc"
+    CERBERO_PACKAGE_ARGS: ""
+    HAVE_CCACHE: ""
+    CERBERO_HOST_DIR: "/Users/gst-ci/cerbero/"
+  tags:
+    - gst-macos-11.1
+  artifacts:
+    name: "${CI_JOB_NAME}_${CI_COMMIT_SHA}"
+    expire_in: '5 days'
+    when: 'always'
+    paths:
+      - "manifest.xml"
+      - "${CERBERO_HOME}/logs"
+      - "gstreamer-1.0-1.*.pkg"
+      - "gstreamer-1.0-devel-1.*.pkg"
+
+cerbero deps cross-macos universal:
+  extends:
+    - '.cerbero deps'
+    - '.cerbero cross-macos universal'
+
+build cerbero cross-macos universal:
+  extends:
+    - '.cerbero'
+    - '.cerbero cross-macos universal'
+  rules:
+    - if: '$CI_PROJECT_NAME !~ /^(cerbero|gst-build|gst-docs|gst-omx|gst-sharp|gstreamer-vaapi|gst-integration-testsuites|gst-plugins-rs)$/'
+
 #
 # Cerbero iOS build
 #