kvm tools: kvm.c needs to include sys/stat.h for mkdir

Fix a missing include.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm.c

@@ -15,6 +15,7 @@
 #include <asm/bootparam.h>
 
 #include <sys/un.h>
+#include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>