eglfs: Add the three missing drag cursors

Hand-tuned in an attempt to get something that matches the normal arrow
cursor.

Task-number: QTBUG-44385
Change-Id: Iea2ee309fccb78706f47003fb11b14156fa01a50
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>

src/plugins/platforms/eglfs/cursor.json

@@ -21,8 +21,8 @@
         [1, 1],
         [12, 12],
         [12, 12],
-        [12, 12],
-        [12, 12],
-        [12, 12]
+        [7, 2],
+        [7, 2],
+        [7, 2]
     ]
 }