python: Use range() instead of xrange()

Python 2 has a range() function which returns a list, and an xrange()
one which returns an iterator.

Python 3 lost the function returning a list, and renamed the function
returning an iterator as range().

As a result, using range() makes the scripts compatible with both Python
versions 2 and 3.

Signed-off-by: Mathieu Bridon <bochecha@daitauha.fr>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

src/intel/vulkan/anv_entrypoints_gen.py

@@ -145,7 +145,7 @@ static const struct string_map_entry string_map_entries[] = {
 /* Hash table stats:
  * size ${len(strmap.sorted_strings)} entries
  * collisions entries:
-% for i in xrange(10):
+% for i in range(10):
  *     ${i}${'+' if i == 9 else ' '}     ${strmap.collisions[i]}
 % endfor
  */