MLCE-545 INT8 TFLite model execution abnormal

 * Signed32 missing from CompareAndPrintOutput

Signed-off-by: Keith Davis <keith.davis@arm.com>
Change-Id: If3c93fb0d73c566ddcf439fceaa6d629029df18f
diff --git a/tests/ExecuteNetwork/ArmNNExecutor.cpp b/tests/ExecuteNetwork/ArmNNExecutor.cpp
index 1e409e8..b894db8 100644
--- a/tests/ExecuteNetwork/ArmNNExecutor.cpp
+++ b/tests/ExecuteNetwork/ArmNNExecutor.cpp
@@ -695,6 +695,11 @@
                     result = ComputeRMSE<float>(outputTensor.second.GetMemoryArea(), otherOutput[index++], size);
                     break;
                 }
+                case armnn::DataType::Signed32:
+                {
+                    result = ComputeRMSE<int32_t>(outputTensor.second.GetMemoryArea(), otherOutput[index++], size);
+                    break;
+                }
                 case armnn::DataType::QSymmS16:
                 {
                     result = ComputeRMSE<int16_t>(outputTensor.second.GetMemoryArea(), otherOutput[index++], size);