Update ACL pin to 4aed4aafa2ddb0b6f4b76aef5008c8bb45599ea4

 * Use axis=-1 in all softmax tests as ACL only accepts this dimension
   (the most right dimension, in ACL is 0 and in ArmNN is -1).

Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: I4be83f60aa9505b4bf2367c4489e6f12d644c6d4
diff --git a/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp b/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
index 6251507..0452919 100644
--- a/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
+++ b/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
@@ -134,10 +134,10 @@
 
     IConnectableLayer* input = net->AddInputLayer(0, "input");
     SoftmaxDescriptor softmaxDescriptor;
-    // Set Axis to 0 if CL or Neon until further Axes are supported.
+    // Set Axis to -1 if CL or Neon until further Axes are supported.
     if ( backends.front() == armnn::Compute::CpuAcc || backends.front() == armnn::Compute::GpuAcc)
     {
-        softmaxDescriptor.m_Axis = 0;
+        softmaxDescriptor.m_Axis = -1;
     }
     IConnectableLayer* softmax = net->AddSoftmaxLayer(softmaxDescriptor, "softmax");
     IConnectableLayer* output  = net->AddOutputLayer(0, "output");