monitor: move include files to include/monitor/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/net/tap.c b/net/tap.c
index f8cabc4..9a677e9 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -35,7 +35,7 @@
 
 #include "net/net.h"
 #include "clients.h"
-#include "monitor.h"
+#include "monitor/monitor.h"
 #include "sysemu.h"
 #include "qemu-common.h"
 #include "qemu-error.h"