monitor: move include files to include/monitor/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/usb/host-linux.c b/hw/usb/host-linux.c
index bdafb6b..5a56e99 100644
--- a/hw/usb/host-linux.c
+++ b/hw/usb/host-linux.c
@@ -32,7 +32,7 @@
 
 #include "qemu-common.h"
 #include "qemu-timer.h"
-#include "monitor.h"
+#include "monitor/monitor.h"
 #include "sysemu.h"
 #include "trace.h"