gallium: add PIPE_QUERY_SO_OVERFLOW_ANY_PREDICATE and corresponding cap

v2: rename cap to PIPE_CAP_QUERY_SO_OVERFLOW and be a bit more explicit
    in the documentation

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
21 files changed