[PATCH v2] drivers: fix symbol exports when map is omitted

[Ferruh Yigit]

On 11/30/2022 10:02 AM, David Marchand wrote:
> ld exports any global symbol by default if no version script is passed.
> As a consequence, the incriminated change let any public symbol leak
> out of the driver shared libraries.
> 
> Hide again those symbols by providing a default map file which
> unexports any global symbol using a local: * catch-all statement.
> 
> The checks are skipped for this default map file as it is intentionnally
> an empty map (see commit b67bdda86cd4 ("devtools: catch empty symbol
> maps")) and there is nothing else to check in this map.
> 
> While at it, move Windows specific objects where needed for better
> readability.
> 
> Fixes: 7dde9c844a37 ("drivers: omit symbol map when unneeded")
> Cc: stable at dpdk.org
> 
> Reported-by: Luca Boccassi <luca.boccassi at microsoft.com>
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> Tested-by: Ferruh Yigit <ferruh.yigit at amd.com>

Tested v2, looks good.
'check-symbol-maps.sh' warning fixed too.