qapi: move include files to include/qobject/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/qemu-config.c b/qemu-config.c
index b4ce0d8..ceec6bd 100644
--- a/qemu-config.c
+++ b/qemu-config.c
@@ -3,7 +3,7 @@
 #include "qemu-option.h"
 #include "qemu-config.h"
 #include "hw/qdev.h"
-#include "error.h"
+#include "qapi/error.h"
 
 static QemuOptsList qemu_drive_opts = {
     .name = "drive",