Add more to cache and artifacts

.gitlab-ci.yml

@@ -2,6 +2,8 @@ cache:
   key: "$CI_COMMIT_REF_NAME"
   paths:
     - .gradle
+    - build
+    - app/.cxx
     - app/build
     - changelog/build
 
@@ -19,6 +21,8 @@ build:
   artifacts:
     paths:
       - app/version.gradle
+      - app/release.gradle
+      - local.properties
 deploy:
   stage: deploy
   script: