IVGCVSW-4472 Yolo v3 ExecuteNetwork failing

 * Add Debug workload for QAsymmS8/U8
 * Change Dequantize tests to test AsymmS8 instead of SymmS8
 * Fix incorrect supportedness within RefLayerSupport

Signed-off-by: Keith Davis <keith.davis@arm.com>
Change-Id: Ie51f1e33c564d46c86bf0150b1addda3fc093d13
diff --git a/src/backends/reference/workloads/RefDebugWorkload.cpp b/src/backends/reference/workloads/RefDebugWorkload.cpp
index 2f0b427..af714a3 100644
--- a/src/backends/reference/workloads/RefDebugWorkload.cpp
+++ b/src/backends/reference/workloads/RefDebugWorkload.cpp
@@ -47,6 +47,7 @@
 template class RefDebugWorkload<DataType::Float16>;
 template class RefDebugWorkload<DataType::Float32>;
 template class RefDebugWorkload<DataType::QAsymmU8>;
+template class RefDebugWorkload<DataType::QAsymmS8>;
 template class RefDebugWorkload<DataType::QSymmS16>;
 template class RefDebugWorkload<DataType::QSymmS8>;
 template class RefDebugWorkload<DataType::Signed32>;