svga: add a few more resource updates HUD query

svga: add a few more resource updates HUD query

This patch adds the following HUD queries:
.num-resource-updates  -- number of resource update. Commands include
                          UPDATE_SUBRESOURCE, UPDATE_GB_IMAGE.
.num-buffer-uploads    -- number of buffer uploads.
.num-const-buf-updates -- number of set constant buffer.
.num-const-updates     -- number of set shader constant.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>