immodule: Fix includes

Make includes not rely on gtkimmodule.h including gtk.h. This will be
important once we remove gtkimmodule from the include files.

That way, we can achieve not pulling deprecated headers automatically.

gtk/gtkimmodule.c

@@ -38,6 +38,8 @@
 #include "gtkprivate.h"
 #include "gtkintl.h"
 
+#include "deprecated/gtkrc.h"
+
 #define SIMPLE_ID "gtk-im-context-simple"
 
 /**

gtk/gtkimmulticontext.c

@@ -24,8 +24,10 @@
 
 #include "gtkimmulticontext.h"
 #include "gtkimmodule.h"
+#include "gtklabel.h"
 #include "gtkmain.h"
 #include "gtkradiomenuitem.h"
+#include "gtkseparatormenuitem.h"
 #include "gtkintl.h"
 #include "gtkprivate.h"
 

gtk/queryimmodules.c

@@ -39,6 +39,7 @@
 
 #include "gtk/gtkimmodule.h"
 #include "gtk/gtkversion.h"
+#include "gtk/deprecated/gtkrc.h"
 
 static void
 escape_string (GString *contents, const char *str)