add DEVICE_TOUCHSCREEN and DEVICE_CORE Xi controls (DeviceIntRec ABI break)

Add DEVICE_TOUCHSCREEN and DEVICE_CORE controls to the Xi code, and the
TouchscreenClassRec and a coreEvents flag, to toggle propagation of core
events.

Xi/getdctl.h

@@ -42,6 +42,16 @@ void CopySwapDeviceResolution(ClientPtr /* client */ ,
 			      int	/* length */
     );
 
+void CopySwapDeviceTouchscreen(ClientPtr /* client */ ,
+                               TouchscreenClassPtr /* ts */ ,
+                               char * /* buf */
+    );
+
+void CopySwapDeviceCore(ClientPtr /* client */ ,
+                        DeviceIntPtr /* dev */ ,
+                        char * /* buf */
+    );
+
 void SRepXGetDeviceControl(ClientPtr /* client */ ,
 			   int /* size */ ,
 			   xGetDeviceControlReply *	/* rep */