!6040 [MS][LITE][Develop]add black box op schema

Merge pull request !6040 from mengyuanli/add_black_box

mindspore/lite/schema/model.fbs

@@ -198,6 +198,7 @@ union PrimitiveType {
     ToFormat,
     Proposal,
     Custom,
+    BlackBox,
 }
 
 enum QuantType: int {

mindspore/lite/schema/ops.fbs

@@ -917,3 +917,10 @@ table Proposal {
 table Custom {
     custom : [ubyte];
 }
+
+
+table BlackBox {
+    id : string;
+    size : int;
+    address : [ubyte];
+}