!1018 fix issue about assignsub operation in globalbn

Merge pull request !1018 from JichenZhao/globalbn_reshape_fix

mindspore/nn/layer/normalization.py

@@ -139,8 +139,9 @@ class _BatchNorm(Cell):
         tmp_mean = self.mul_mean(mean_sub, self.cast(self.momentum, self.dtype(mean_sub)))
         mean_sub2 = self.sub_var(self.reshape(self.moving_mean, re_shape), global_var)
         tmp_variance = self.mul_var(mean_sub2, self.cast(self.momentum, self.dtype(mean_sub2)))
-        y = F.depend(y, self.assign_sub_mean(self.reshape(self.moving_mean, re_shape), tmp_mean))
-        y = F.depend(y, self.assign_sub_var(self.reshape(self.moving_variance, re_shape), tmp_variance))
+        y = F.depend(y, self.assign_sub_mean(self.moving_mean, self.reshape(tmp_mean, self.shape(self.moving_mean))))
+        y = F.depend(y, self.assign_sub_var(self.moving_variance,
+                                            self.reshape(tmp_variance, self.shape(self.moving_variance))))
         return y
 
     def construct(self, x):