[nnpackage] Update circle schema (Samsung#12862)

This commit updates circle schema to 0.8.
It's a copy from  `res/CircleSchema/0.8`.

ONE-DCO-1.0-Signed-off-by: Hyeongseok Oh <[email protected]>

nnpackage/schema/circle_schema.fbs

@@ -32,6 +32,7 @@
 // Version 0.5: Base up to TensorFlow Lite v2.10.1 schema.
 // Version 0.6: Base up to TensorFlow Lite v2.13.0 schema.
 // Version 0.7: Base up to TensorFlow Lite v2.15.0 schema, deprecate data_format in Subgraph table
+// Version 0.8: GRU op is added. UINT4 is added.
 
 namespace circle;
 
@@ -45,6 +46,7 @@ file_extension "circle";
 
 // The type of data stored in a tensor.
 enum TensorType : byte {
+  UINT4 = -1,
   FLOAT32 = 0,
   FLOAT16 = 1,
   INT32 = 2,
@@ -268,6 +270,7 @@ table Tensor {
 // set of acceptable options.
 // LINT.IfChange
 enum BuiltinOperator : int32 {
+  GRU = -5,
   BCQ_GATHER = -4,
   BCQ_FULLY_CONNECTED = -3,
   INSTANCE_NORM = -2,
@@ -616,6 +619,7 @@ union BuiltinOptions {
   BitcastOptions,
   BitwiseXorOptions,
   RightShiftOptions,
+  GRUOptions = 251,
   BCQGatherOptions = 252,
   BCQFullyConnectedOptions = 253,
   InstanceNormOptions = 254,
@@ -1478,6 +1482,12 @@ table ReduceWindowOptions{
   reduce_function: ReduceWindowFunction;
 }
 
+table GRUOptions {
+  fused_activation_function:ActivationFunctionType;
+  return_sequences : bool;
+  time_major : bool;
+}
+
 table BCQGatherOptions {
   input_hidden_size: int;
   axis: int;