GitHub #292 Move BackendRegistry.hpp to the public API

 * Moved to BackendRegistry.hpp include/armnn
 * Updated makefiles and sources accordingly

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Change-Id: I4d83abb581d523218a880c879fcf30c9611f7fd7
diff --git a/src/backends/cl/ClRegistryInitializer.cpp b/src/backends/cl/ClRegistryInitializer.cpp
index 4d6f5f4..8decd6f 100644
--- a/src/backends/cl/ClRegistryInitializer.cpp
+++ b/src/backends/cl/ClRegistryInitializer.cpp
@@ -5,7 +5,7 @@
 
 #include "ClBackend.hpp"
 
-#include <backendsCommon/BackendRegistry.hpp>
+#include <armnn/BackendRegistry.hpp>
 
 namespace
 {