For the purposes of wined3d_cs_map_upload_bo().

That is, if a buffer was just created or just discarded [e.g. with
wined3d_device_evict_managed_resources()], and then subsequently mapped with
WINED3D_MAP_NOOVERWRITE, treat it as if it had been mapped with
WINED3D_MAP_DISCARD instead, thus allowing the adapter_alloc_upload_bo callback
to allocate a new buffer from the client thread.

This was the source of a bunch of stalls in Grand Theft Auto V, although it's
hard to measure a difference in performance.
Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>