Merge branch 'feature/add_build_at_job_in_ci' into 'master'

CI: add job to check build esp-at in esp-idf

Add a job to check if latest IDF breaks `esp-at` build.

As `esp-at` is an application and has its own CI, we don't save binary as artifacts.

See merge request !462

.gitlab-ci.yml

@@ -79,6 +79,15 @@ build_ssc:
     - chmod +x gen_misc_ng.sh
     - ./gen_misc_ng.sh
 
+build_at:
+  <<: *build_template
+  script:
+    - git clone $GITLAB_SSH_SERVER/application/esp-at.git
+    - cd esp-at
+    - git checkout ${CI_BUILD_REF_NAME} || echo "Using esp-at default branch..."
+    - make defconfig
+    - make
+
 build_esp_idf_tests:
   <<: *build_template
   artifacts: