Add GitLab CI pipeline

Change-Id: I2c634be966e0f48e49d430e2ea15a5c7980c3670
diff --git a/.gitignore b/.gitignore
index 5af5296..324fc0f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 .*\.log
 .*LOG
 LOG.*
+!.gitlab-ci.yml