CI: Add gitlab-ci files to the repository

.gitlab-ci @ 939ade2b

+Subproject commit 939ade2b9f98b3e1569332270a7ab16ce7d70b4a

.gitlab-ci.yml

+---
+# ---------------------------------------------------------------------------------------
+# Include the default CI steps from the gitlab-ci repo
+# ---------------------------------------------------------------------------------------
+include:
+  - project: '${CI_PROJECT_ROOT_NAMESPACE}/yocto/infrastructure/gitlab-ci'
+    ref: 939ade2b9f98b3e1569332270a7ab16ce7d70b4a
+    file: 'manifest-integration.yml'
+
+variables:
+  GITLAB_CI_REVISION: 939ade2b9f98b3e1569332270a7ab16ce7d70b4a
+  BB_RECIPE_NAME: secure-element-examples

.gitmodules

+[submodule ".gitlab-ci"]
+	path = .gitlab-ci
+	url = ../../yocto/infrastructure/gitlab-ci.git