CI: Add CI scripts

.gitlab-ci @ 31e5a427

+Subproject commit 31e5a427d57e2d3cac971a32d18e6274932adb99

.gitlab-ci.yml

+---
+# ---------------------------------------------------------------------------------------
+# Include the default CI steps from the gitlab-ci repo
+# ---------------------------------------------------------------------------------------
+include:
+  - project: '${CI_PROJECT_ROOT_NAMESPACE}/yocto/infrastructure/gitlab-ci'
+    ref: 31e5a427d57e2d3cac971a32d18e6274932adb99
+    file: 'manifest-integration.yml'
+
+variables:
+  GITLAB_CI_REVISION: 31e5a427d57e2d3cac971a32d18e6274932adb99
+  BB_RECIPE_NAME: seco-yocto-testsuite

.gitmodules

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