[TF-numpy] Adds __rmatmul__ method to ndarray.

PiperOrigin-RevId: 317771125
Change-Id: I719c46d97ae1c68ac59dcd1cf8f65d067ddc7658

tensorflow/python/ops/numpy_ops/np_math_ops.py

@@ -950,11 +950,12 @@ setattr(np_arrays.ndarray, '__sub__', _wrap(subtract))
 setattr(np_arrays.ndarray, '__rsub__', _wrap(subtract, True))
 setattr(np_arrays.ndarray, '__mul__', _wrap(multiply))
 setattr(np_arrays.ndarray, '__rmul__', _wrap(multiply, True))
+setattr(np_arrays.ndarray, '__matmul__', _wrap(matmul))
+setattr(np_arrays.ndarray, '__rmatmul__', _wrap(matmul, True))
 setattr(np_arrays.ndarray, '__pow__', _wrap(power))
 setattr(np_arrays.ndarray, '__rpow__', _wrap(power, True))
 setattr(np_arrays.ndarray, '__truediv__', _wrap(true_divide))
 setattr(np_arrays.ndarray, '__rtruediv__', _wrap(true_divide, True))
-setattr(np_arrays.ndarray, '__matmul__', _wrap(matmul))
 
 
 def _comparison(tf_fun, x1, x2, cast_bool_to_int=False):