Upload headless results in after_script

I need to see the results even for passing builds, so I can tell how
allowed failures are still failing.

scripts/linux/after_script.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -e
+set -o pipefail
+
+if [ ! -z "${AWS_ACCESS_KEY_ID}" ] && [ ! -z "${AWS_SECRET_ACCESS_KEY}" ] ; then
+    # Install and add awscli to PATH for uploading the results
+    mapbox_time "install_awscli" \
+    pip install --user awscli
+    export PATH="`python -m site --user-base`/bin:${PATH}"
+
+    mapbox_time_start "deploy_results"
+    (cd ./test/suite/ && ./bin/deploy_results.sh)
+    mapbox_time_finish
+fi