io/task: Move 'qom/object.h' header to source

We need "qom/object.h" to call object_ref()/object_unref(),
and to test the TYPE_DUMMY.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200504115656.6045-3-f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/io/task.h

@@ -21,8 +21,6 @@
 #ifndef QIO_TASK_H
 #define QIO_TASK_H
 
-#include "qom/object.h"
-
 typedef struct QIOTask QIOTask;
 
 typedef void (*QIOTaskFunc)(QIOTask *task,

io/task.c

@@ -22,6 +22,7 @@
 #include "io/task.h"
 #include "qapi/error.h"
 #include "qemu/thread.h"
+#include "qom/object.h"
 #include "trace.h"
 
 struct QIOTaskThreadData {

tests/test-io-task.c

@@ -20,6 +20,7 @@
 
 #include "qemu/osdep.h"
 
+#include "qom/object.h"
 #include "io/task.h"
 #include "qapi/error.h"
 #include "qemu/module.h"