Merge branch 'Gitlab_CI_assets' into 'master'

fix the missing assets in artifact

See merge request veloren/veloren!123

Former-commit-id: 214e164e3a8c006e93e231c38d365b4c93f05085

.gitlab-ci.yml

@@ -28,6 +28,9 @@ before_script:
   - if [ ! -z "${SOURCE_PROJECT}" -a "${SOURCE_PROJECT}" != " " ]; then
       echo "THIS SEEMS TO BE A MERGE PIPELINE FROM ${SOURCE_PROJECT}/${SOURCE_BRANCH}";
       git pull "https://gitlab.com/${SOURCE_PROJECT}/veloren.git" "${SOURCE_BRANCH}";
+      git lfs install;
+      git lfs fetch;
+      git lfs checkout;
     fi;
   - git status
   - if [ -d target ]; then