COMPMID-2779: Add support for generating synthetic int8 graphs.

Adds SyntheticDataTypeMutator, which is responsible for mutating graphs
to int8 and thus enable performance analysis on a wider range of models.

Change-Id: I9a00f0ae59421ab11952660f5115b5dcd9314aaf
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2418
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/src/graph/mutators/SplitLayerSubTensorMutator.cpp b/src/graph/mutators/SplitLayerSubTensorMutator.cpp
index e21252a..3ba7307 100644
--- a/src/graph/mutators/SplitLayerSubTensorMutator.cpp
+++ b/src/graph/mutators/SplitLayerSubTensorMutator.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -42,6 +42,11 @@
     return "SplitLayerSubTensorMutator";
 }
 
+IGraphMutator::MutationType SplitLayerSubTensorMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void SplitLayerSubTensorMutator::mutate(Graph &g)
 {
     // Early exit if no Split layers exist in graph