lguest: define VIRTIO_CONFIG_NO_LEGACY in example launcher.

We only support virtio 1.0 now
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>

tools/lguest/lguest.c

@@ -63,6 +63,7 @@ typedef uint16_t u16;
 typedef uint8_t u8;
 /*:*/
 
+#define VIRTIO_CONFIG_NO_LEGACY
 #define VIRTIO_PCI_NO_LEGACY
 #define VIRTIO_BLK_NO_LEGACY