IVGCVSW-2049 + IVGCVSW-2051 Create the CL Mean Float workload and add
the unit tests

 * Created the ClFloatWorkload class
 * Added ClMeanValidate validation function
 * Added helper function to convert the reduction axes from the ArmNN
   format to ACL's
 * Added workload tests
 * Added some unit tests
 * These changes need the CL pin to be pointing at least to revision
   88d871028eeae57f9e4536d0329110eccb5e2890 (COMPMID-1574 Implement
   ReduceMean in OpenCL)

!android-nn-driver:155033

Change-Id: I694fd36be0458c90e158172afde045fcc88c32ae
diff --git a/src/backends/cl/workloads/CMakeLists.txt b/src/backends/cl/workloads/CMakeLists.txt
index 59a45fa..86c3804 100644
--- a/src/backends/cl/workloads/CMakeLists.txt
+++ b/src/backends/cl/workloads/CMakeLists.txt
@@ -30,6 +30,8 @@
     ClL2NormalizationFloatWorkload.hpp
     ClLstmFloatWorkload.cpp
     ClLstmFloatWorkload.hpp
+    ClMeanWorkload.cpp
+    ClMeanWorkload.hpp
     ClMergerWorkload.hpp
     ClMultiplicationWorkload.cpp
     ClMultiplicationWorkload.hpp