IVGCVSW-3119 Rename MergerLayer to ConcatLayer

!android-nn-driver:1210

Change-Id: I940b3b9e421c92bfd55ae996f7bc54ac077f2604
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/src/backends/reference/workloads/RefConcatWorkload.cpp b/src/backends/reference/workloads/RefConcatWorkload.cpp
index 9abddc0..152eae9 100644
--- a/src/backends/reference/workloads/RefConcatWorkload.cpp
+++ b/src/backends/reference/workloads/RefConcatWorkload.cpp
@@ -5,7 +5,7 @@
 
 #include "RefConcatWorkload.hpp"
 
-#include "Merger.hpp"
+#include "Concatenate.hpp"
 
 #include "Profiling.hpp"
 
@@ -15,7 +15,7 @@
 void RefConcatWorkload::Execute() const
 {
     ARMNN_SCOPED_PROFILING_EVENT(Compute::CpuRef, "RefConcatWorkload_Execute");
-    Merger(m_Data);
+    Concatenate(m_Data);
 }
 
 } //namespace armnn