Update ACL pin to 704c22f1373e1276acb43c71e7e17048271bbc03

* Update ACL pin
* ACL removed softmax_layer_max_shift_exp_sum_quantized_serial cl kernel
* Replace softmax_layer_max_shift_exp_sum_quantized_serial with softmax_x

Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>
Change-Id: I0830605d72999d5a80f06e1b8498bc7b674195e3
diff --git a/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp b/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
index c5f9869..73aaca3 100644
--- a/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
+++ b/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
@@ -259,7 +259,7 @@
     const armnn::BackendId& firstBackend = backends.at(0);
     if (firstBackend == armnn::Compute::GpuAcc)
     {
-        CHECK(result.find("OpenClKernelTimer/: softmax_layer_max_shift_exp_sum_quantized_serial GWS[,,]")
+        CHECK(result.find("OpenClKernelTimer/: softmax_x GWS[,,]")
                     != std::string::npos);
     }
     else if (firstBackend == armnn::Compute::CpuAcc)