IVGCVSW-1881 Add PadLayer to ArmNN

Change-Id: Ib70883a20fa7b82bfb090aa98cc51a6d645b5722
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ddad99..cfbbae6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -199,6 +199,8 @@
     src/armnn/layers/NormalizationLayer.cpp
     src/armnn/layers/OutputLayer.hpp
     src/armnn/layers/OutputLayer.cpp
+    src/armnn/layers/PadLayer.hpp
+    src/armnn/layers/PadLayer.cpp
     src/armnn/layers/PermuteLayer.hpp
     src/armnn/layers/PermuteLayer.cpp
     src/armnn/layers/Pooling2dLayer.hpp