Include persistent controls headers in the all headers test

Check for the absence of warnings when compiling these headers too, they
were simply forgotten (and not intentionally excluded) before.

tests/allheaders.h

@@ -254,6 +254,12 @@
 #include <wx/pen.h>
 #include <wx/peninfobase.h>
 #include <wx/persist.h>
+#include <wx/persist/bookctrl.h>
+#include <wx/persist/dataview.h>
+#include <wx/persist/splitter.h>
+#include <wx/persist/toplevel.h>
+#include <wx/persist/treebook.h>
+#include <wx/persist/window.h>
 #include <wx/pickerbase.h>
 #include <wx/platform.h>
 #include <wx/platinfo.h>