[REF] odoo-shippable: Change execution permission
Fix error: /usr/local/bin/ngrok: permission denied.
Steps to reproduce it:
docker run --rm vauxoo/odoo-80-image-shippable-auto /usr/local/bin/ngrok --version
docker: Error response from daemon: oci runtime error: exec: "/usr/local/bin/ngrok": permission denied.
Continuation of https://github.com/Vauxoo/docker-odoo-image/pull/157