IVGCVSW-1837: Enable broadcast tests for SUB CL/NEON Workload

Enabled subtraction broadcasting tests for CL/NEON
Enabled Uint8 subtraction tests for CL

Change-Id: Id36c1530f967c77f5633616e8f491cac9547724b
diff --git a/src/backends/cl/test/ClLayerTests.cpp b/src/backends/cl/test/ClLayerTests.cpp
index f63f65c..b9b26ac 100755
--- a/src/backends/cl/test/ClLayerTests.cpp
+++ b/src/backends/cl/test/ClLayerTests.cpp
@@ -202,6 +202,12 @@
 
 // Sub
 ARMNN_AUTO_TEST_CASE(SimpleSub, SubtractionTest)
+ARMNN_AUTO_TEST_CASE(SubBroadcast1Element, SubtractionBroadcast1ElementTest)
+ARMNN_AUTO_TEST_CASE(SubBroadcast, SubtractionBroadcastTest)
+
+ARMNN_AUTO_TEST_CASE(SubtractionUint8, SubtractionUint8Test)
+ARMNN_AUTO_TEST_CASE(SubBroadcastUint8, SubtractionBroadcastUint8Test)
+ARMNN_AUTO_TEST_CASE(SubBroadcast1ElementUint8, SubtractionBroadcast1ElementUint8Test)
 
 // Div
 ARMNN_AUTO_TEST_CASE(SimpleDivision, DivisionTest)