[TOPI] modify conv2d_transpose schedule (#613)

topi/python/topi/cuda/conv2d_transpose_nchw.py

@@ -75,7 +75,7 @@ def schedule_conv2d_transpose_small_batch(outs):
 
     def traverse(OP):
         # inline all one-to-one-mapping operators except the last stage (output)
-        if tag.is_broadcast(OP.tag):
+        if tag.is_injective(OP.tag):
             if OP not in s.outputs:
                 s[OP].compute_inline()
             for tensor in OP.input_tensors: