gitlab.sh: Add debug information

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

release-scripts/gitlab.sh

@@ -25,7 +25,15 @@ api(){
     fi
     shift
 
+    if [ "$DEBUG" = "1" ]; then
+        set -x
+    fi
+
     curl -s -H "PRIVATE-TOKEN: $GITLAB_TOKEN" --request ${request:-GET} $api_base_url$api_endpoint$items "$@"
+
+    if [ "$DEBUG" = "1" ]; then
+        set +x
+    fi
 }
 
 get-id(){