resolve XT_KERNEL_CHECK header file and BUCK dep (pytorch#7529)

Summary:

- Apply buck fix to Cadence's diff. 
- resolved duplicate work internally
- fixed naming of mean

Reviewed By: hsharma35

Differential Revision: D67875050

Author: zonglinpeng

backends/cadence/fusion_g3/operators/op_mean.cpp

@@ -59,7 +59,7 @@ int prepare_data(
   return num_axis_dims;
 }
 
-Tensor& mean_dim_out(
+Tensor& mean_out(
     KernelRuntimeContext& ctx,
     const Tensor& in,
     optional<ArrayRef<int64_t>> dim_list,
@@ -199,4 +199,4 @@ Tensor& mean_dim_out(
 } // namespace native
 } // namespace G3
 } // namespace impl
-} // namespace cadence
+} // namespace cadence

backends/cadence/fusion_g3/operators/targets.bzl

@@ -36,9 +36,14 @@ OPERATORS = [
     "add",
     "cat",
     "dequantize",
+    "div",
+    "exp",
+    "mean",
     "mul",
     "native_layer_norm",
+    "permute_copy",
     "quantize",
+    "slice_copy",
     "softmax",
     "sub",
     "div",