Build everything in a container.

Docker containers don't have the SSH_KEY so we need to copy
archives and git repo in a directory on the host and
launch deploy.sh script from there.

travis/upload_base_deps.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -e
+
+BASE_EXPORT_DIR=$HOME/EXPORT/BASE
+ls $BASE_EXPORT_DIR
+
+BASE_ARCHIVES=$(find $BASE_EXPORT_DIR -type f)
+echo $BASE_ARCHIVES
+if [[ "x$BASE_ARCHIVES" != "x" ]]
+then
+  scp -vrp -i ${SSH_KEY} -o StrictHostKeyChecking=no \
+    $BASE_ARCHIVES \
+    ci@tmp.kiwix.org:/data/tmp/ci
+fi