IVGCVSW-4386 Add ArmNN reference support for QAsymmS8

 * Added Quantization Scheme for QAsymmS8
 * Added Unit Tests for QAsymmS8
 * Renamed QAsymm8 calls to QAsymmU8

Signed-off-by: Ryan OShea <Ryan.OShea2@arm.com>
Change-Id: I897b4e018ba1d808cc3f8c113f2be2dbad49c8db
diff --git a/src/backends/backendsCommon/test/layerTests/QuantizeTestImpl.cpp b/src/backends/backendsCommon/test/layerTests/QuantizeTestImpl.cpp
index 9c2bc84..e8996d4 100644
--- a/src/backends/backendsCommon/test/layerTests/QuantizeTestImpl.cpp
+++ b/src/backends/backendsCommon/test/layerTests/QuantizeTestImpl.cpp
@@ -139,6 +139,13 @@
     return QuantizeClampTest<armnn::DataType::QAsymmU8>(workloadFactory, memoryManager);
 }
 
+LayerTestResult<int8_t, 4> QuantizeClampAsymmInt8Test(
+    armnn::IWorkloadFactory& workloadFactory,
+    const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager)
+{
+    return QuantizeClampTest<armnn::DataType::QAsymmS8>(workloadFactory, memoryManager);
+}
+
 LayerTestResult<int8_t, 4> QuantizeClampInt8Test(
         armnn::IWorkloadFactory& workloadFactory,
         const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager)