input: Add labels to buttons and valuators - ABI_XINPUT_VERSION 7

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

include/inputstr.h

@@ -215,6 +215,7 @@ typedef struct _AxisInfo {
     int		max_resolution;
     int		min_value;
     int		max_value;
+    Atom	label;
 } AxisInfo, *AxisInfoPtr;
 
 typedef struct _ValuatorAccelerationRec {
@@ -254,6 +255,7 @@ typedef struct _ButtonClassRec {
     CARD8		postdown[DOWN_LENGTH];
     CARD8		map[MAP_LENGTH];
     union _XkbAction    *xkb_acts;
+    Atom		labels[MAX_BUTTONS];
 } ButtonClassRec, *ButtonClassPtr;
 
 typedef struct _FocusClassRec {