Using testing will need continued updates of the basic build scripts and
sometimes packages might even not be available, so lets switch to buster
and buster-backports.
v2: Fix include directory declaration
Closes: #147
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>