ci: Add config for buster

.gitlab-ci.yml

@@ -46,6 +46,23 @@ variables:
   only:
     - master
 
+build/raspbian/buster:
+  <<: *build
+  variables:
+    DOCKER_IMAGE: raspbian/buster
+
+test/raspbian/buster:
+  <<: *test
+  variables:
+    DOCKER_IMAGE: raspbian/buster
+  dependencies:
+    - build/raspbian/buster
+
+upload/raspbian/buster:
+  <<: *upload
+  dependencies:
+    - build/raspbian/buster
+
 build/raspbian/stretch:
   <<: *build
   variables: