Arm backend: Fix for test

Change-Id: I5a25a990c9aa2f762a882be3f958df86e40f550e

Author: wwwind

backends/arm/test/misc/test_outputs_order.py

@@ -112,7 +112,7 @@ def test_network_output_order_and_restore(tmp_path, batch_size):
         out_shapes = _read_tosa_outputs(tosa_files[0])
     # We use shape that is unique to output to check
     # that we preserve output order
-    channel_dims = [s[-1] for s in out_shapes]
+    channel_dims = [s[1] for s in reversed(out_shapes)]
     assert channel_dims == [1, 2, 3], (
         "Outputs in .tosa do not keep author order: "
         f"expected [1, 2, 3], got {channel_dims}"