Rewrite model frontend to be json-driven.

Change-Id: Iac786eff96183938d2fd11cde9313c6e8e1270a5
diff --git a/examples/test_add_1x4x4x4_f32/flatbuffer-tf/desc.json b/examples/test_add_1x4x4x4_f32/flatbuffer-tf/desc.json
new file mode 100644
index 0000000..1a86713
--- /dev/null
+++ b/examples/test_add_1x4x4x4_f32/flatbuffer-tf/desc.json
@@ -0,0 +1,18 @@
+{
+  "tosa_file": "test_add_1x4x4x4_f32.tosa",
+  "ifm_name": [
+    "InputTensor-tf0",
+    "InputTensor-tf1"
+  ],
+  "ifm_file": [
+    "../placeholder_0.npy",
+    "../placeholder_1.npy"
+  ],
+  "ofm_name": [
+    "Result0"
+  ],
+  "ofm_file": [
+    "ref_model_Result0.npy"
+  ],
+  "expected_failure": false
+}
\ No newline at end of file