Debugger: port python debug test to python 3

Change-Id: I1e546b8c151f59432292118a0a6b4d913196e79b
Reviewed-by: hjk <hjk@qt.io>

tests/manual/debugger/python/math.py

@@ -33,17 +33,17 @@ def testMath():
         t = (1, 2, 3)
         d = {1: 'one', 2: 'two', 'three': 3}
         s = u'unixcode'
-        x = xrange(1, 10)
-        b = buffer("xxx")
+        x = range(1, 10)
+#        b = buffer("xxx")
         x = square(a)
         x = x * a
         x = x + 1
         x = x - 1
         return x
 
-    print cube(3)
-    print cube(4)
-    print cube(5)
+    print(cube(3))
+    print(cube(4))
+    print(cube(5))
 
 def main():
     testMath()