vhost test module

This adds a test module for vhost infrastructure.
Intentionally not tied to kbuild to prevent people
from installing and loading it accidentally.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

tools/virtio/vhost_test/Makefile

@@ -0,0 +1,2 @@
+obj-m += vhost_test.o
+EXTRA_CFLAGS += -Idrivers/vhost

tools/virtio/vhost_test/vhost_test.c

@@ -0,0 +1 @@
+#include "test.c"