monitor: move include files to include/monitor/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/qemu-timer.c b/qemu-timer.c
index 5a99403..8e0dccc 100644
--- a/qemu-timer.c
+++ b/qemu-timer.c
@@ -23,7 +23,7 @@
  */
 
 #include "sysemu.h"
-#include "monitor.h"
+#include "monitor/monitor.h"
 #include "ui/console.h"
 
 #include "hw/hw.h"