build: fix drivers library path on Windows

import library (/IMPLIB) in meson.build should use
the 'drivers' and not 'libs' folder.

The error is: fatal error LNK1149: output filename matches input filename.
The fix uses the correct folder.

Fixes: 5ed3766981 ("drivers: process shared link dependencies as for libs")
Cc: stable@dpdk.org
Signed-off-by: Tal Shnaiderman <talshn@mellanox.com>