ci: do not require git pull to succeed

.gitlab-ci.yml

@@ -33,7 +33,8 @@ default:
     - git config --global user.name "FFS Buildbot"
     - mkdir -p ~/.ssh
     - cat gitlab-known-hosts >> ~/.ssh/known_hosts
-    - cd gluon/openwrt/dl && git pull 
+    - cd gluon/openwrt/dl 
+    - git pull || true
     - git add . && git commit -m "update DL cache" || true
     - git pull && git push || true