Update feed: Add econet feed

@sukrus @ghorbel

There is pieline error:

Found errors in your .gitlab-ci.yml: Project devops/iopsyswrt not found or access denied! You can also test your .gitlab-ci.yml in CI Lint

Signed-off-by: Bartlomiej Grzeskowiak bartlomiej.grzeskowiak@iopsys.eu