Pin CI builds to runners with 32GB of RAM to avoid OOM conditions.

.gitlab-ci.yml

@@ -15,6 +15,8 @@ default:
     # See https://about.gitlab.com/blog/2018/10/24/setting-up-gitlab-ci-for-android-projects/
     # https://github.com/docker-library/openjdk/blob/master/8/jdk/buster/Dockerfile
     image: openjdk:8-jdk
+    tags:
+        - 32GB
 
     before_script:
         - set -e