Fix arm builds

ci/image/run.sh

@@ -5,9 +5,22 @@ set -euo pipefail
 main() {
   cd "$(dirname "$0")/../.."
 
+  # This, strangely enough, fixes the arm build being terminated for not having
+  # output on Travis. It's as if output is buffered and only displayed once a
+  # certain amount is collected. Five seconds didn't work but one second seems
+  # to generate enough output to make it work.
+  local pid
+  while true; do
+    echo 'Still running...'
+    sleep 1
+  done &
+  pid=$!
+
   docker build ci/image
   imageTag="$(docker build -q ci/image)"
   docker run -t --rm -e CI -e GITHUB_TOKEN -e TRAVIS_TAG -v "$(yarn cache dir):/usr/local/share/.cache/yarn/v6" -v "$PWD:/repo" -w /repo "$imageTag" "$*"
+
+  kill $pid
 }
 
 main "$@"