migration: move include files to include/migration/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 3796775..962475d 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -34,7 +34,7 @@
 #include "qapi/qmp/qstring.h"
 #include "qapi/qmp/qjson.h"
 #include "notify.h"
-#include "migration.h"
+#include "migration/migration.h"
 #include "monitor/monitor.h"
 #include "hw/hw.h"
 #include "ui/spice-display.h"