IVGCVSW-1900 : CL backend folder structure

* moving backends/ClWorkloads to backends/cl
* and moving pure Cl workload related code to
  backends/cl/workloads

Change-Id: I019a3c6b4da5e7a23074bf03fb057e63199ad129
diff --git a/src/backends/cl/CMakeLists.txt b/src/backends/cl/CMakeLists.txt
new file mode 100644
index 0000000..80ca0ac
--- /dev/null
+++ b/src/backends/cl/CMakeLists.txt
@@ -0,0 +1,22 @@
+#
+# Copyright © 2017 Arm Ltd. All rights reserved.
+# SPDX-License-Identifier: MIT
+#
+
+list(APPEND armnnClBackend_sources
+    ClContextControl.cpp
+    ClContextControl.hpp
+    ClLayerSupport.cpp
+    ClLayerSupport.hpp
+    ClWorkloadFactory.cpp
+    ClWorkloadFactory.hpp
+)
+
+if(ARMCOMPUTECL)
+    add_subdirectory(workloads test)
+endif()
+
+add_library(armnnClBackend STATIC ${armnnClBackend_sources})
+target_include_directories(armnnClBackend PRIVATE ${PROJECT_SOURCE_DIR}/src)
+target_include_directories(armnnClBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnn)
+target_include_directories(armnnClBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnnUtils)