tools/xenmon: xenbaked: Mark const the field text in stat_map_t

The field text in stat_map_t will point to string literals. So mark it
as const to allow the compiler to catch any modified of the string.

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Wei Liu <wl@xen.org>

tools/xenmon/xenbaked.c

@@ -182,7 +182,7 @@ typedef struct
 {
     int event_count;
     int event_id;
-    char *text;
+    const char *text;
 } stat_map_t;
 
 stat_map_t stat_map[] = {