monitor: Export QDict header

Command handlers will have to use QDict functions, so export
qdict.h through monitor.h.
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

monitor.h

@@ -3,6 +3,7 @@
 
 #include "qemu-common.h"
 #include "qemu-char.h"
+#include "qdict.h"
 #include "block.h"
 
 extern Monitor *cur_mon;