.lo files in stubs/, util/ and libcacard/ were not cleaned.
Fix this.

Cc: Blue Swirl <blauwirbel@gmail.com>
Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>