The current builds don't include all the features which are
auto-detected and then disabled when the appropriate test packages don't
exist. I've added another target that enables all known additional
packages for increased coverage. I didn't add it to the core package
list to reduce build time.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>