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/armnn/Runtime.cpp b/src/armnn/Runtime.cpp
index 68975a2..c95b2c4 100644
--- a/src/armnn/Runtime.cpp
+++ b/src/armnn/Runtime.cpp
@@ -5,8 +5,8 @@
 #include "Runtime.hpp"
 
 #include <armnn/Version.hpp>
+#include <armnn/BackendRegistry.hpp>
 
-#include <backendsCommon/BackendRegistry.hpp>
 #include <backendsCommon/IBackendContext.hpp>
 #include <backendsCommon/DynamicBackendUtils.hpp>