monitor: move include files to include/monitor/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/lm32_pic.c b/hw/lm32_pic.c
index 32f65db..42d5602 100644
--- a/hw/lm32_pic.c
+++ b/hw/lm32_pic.c
@@ -21,7 +21,7 @@
 
 #include "hw.h"
 #include "pc.h"
-#include "monitor.h"
+#include "monitor/monitor.h"
 #include "sysbus.h"
 #include "trace.h"
 #include "lm32_pic.h"