vz: build fix after excluding cross driver headers

Build is broken by 5529b057 [1].

[1] cfg: forbid includes of headers in network and storage drivers again
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

src/vz/vz_sdk.c

@@ -29,6 +29,7 @@
 #include "virlog.h"
 #include "datatypes.h"
 #include "domain_conf.h"
+#include "storage_conf.h"
 #include "virtime.h"
 #include "virhostcpu.h"
 #include "virsocketaddr.h"