build: Support gateway-docker, quit on error
build: Support gateway-docker, quit on error

To avoid unexpected behaviours, quit on error (set -e)

Change-Id: Ifbf6401b66afd71472f1b953a7aa4b57c0ecfd3f
Relate-to: https://github.com/mozilla-iot/gateway-docker/pull/9
Signed-off-by: Philippe Coval <e55eb7f5ae8caa4c9c0d2fc7cb5c13ca6c4cd6e0@samsung.com>

moziot/gateway,mozilla-iot/gateway,moziot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,moziot/gateway,mozilla-iot/gateway,mozilla-iot/gateway