Vela: Fix wrong bandwidth

  - copy bandwidth compression rate when weight tensor is cloned

Signed-off-by: Diqing Zhong <diqing.zhong@arm.com>
Change-Id: I41c4c1f7001e8dc12af35695f5f5d02815e28351
diff --git a/ethosu/vela/tensor.py b/ethosu/vela/tensor.py
index 4110fa6..0fcf9a9 100644
--- a/ethosu/vela/tensor.py
+++ b/ethosu/vela/tensor.py
@@ -440,6 +440,7 @@
         self.weight_transpose_depthwise = src_tens.weight_transpose_depthwise
         self.compression_scale_for_worst_weight_stream = src_tens.compression_scale_for_worst_weight_stream
         self.storage_compression_scale = src_tens.storage_compression_scale
+        self.bandwidth_compression_scale = src_tens.bandwidth_compression_scale
         self.block_traversal = src_tens.block_traversal
         self.weight_compression_config = src_tens.weight_compression_config
         self.value_id = src_tens.value_id