block: move include files to include/block/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/cmd.c b/cmd.c
index f40f09b..01a8c3a 100644
--- a/cmd.c
+++ b/cmd.c
@@ -24,7 +24,7 @@
 #include <getopt.h>
 
 #include "cmd.h"
-#include "qemu-aio.h"
+#include "block/aio.h"
 #include "main-loop.h"
 
 #define _(x)	x	/* not gettext support yet */