IVGCVSW-6790 Adding runtime options to Doxygen.

* Add a breakdown of the runtime options to the documentation.
* Exclude test classes from Doxygen generation.
* Limit the file extension selection for Doxygen generation.
* Add the support library to be generated.
* Fix some broken markups.

Signed-off-by: Colm Donelan <colm.donelan@arm.com>
Change-Id: I81896f2d7fff503a1d51d6d4ac3876aa8b84118e
diff --git a/include/armnn/backends/IBackendInternal.hpp b/include/armnn/backends/IBackendInternal.hpp
index a18adba..a14e59e 100644
--- a/include/armnn/backends/IBackendInternal.hpp
+++ b/include/armnn/backends/IBackendInternal.hpp
@@ -153,12 +153,12 @@
 
     /// (Optional) Register TensorHandleFactories
     /// Either this method or CreateMemoryManager() and
-    /// IWorkloadFactory::CreateTensor()/IWorkloadFactory::CreateSubtensor() methods must be implemented.
+    /// IWorkloadFactory::CreateTensor() IWorkloadFactory::CreateSubtensor() methods must be implemented.
     virtual void RegisterTensorHandleFactories(class TensorHandleFactoryRegistry& /*registry*/) {}
 
     /// (Optional) Register TensorHandleFactories
     /// Either this method or CreateMemoryManager() and
-    /// IWorkloadFactory::CreateTensor()/IWorkloadFactory::CreateSubtensor() methods must be implemented.
+    /// IWorkloadFactory::CreateTensor() IWorkloadFactory::CreateSubtensor() methods must be implemented.
     virtual void RegisterTensorHandleFactories(class TensorHandleFactoryRegistry& registry,
                                                MemorySourceFlags inputFlags,
                                                MemorySourceFlags outputFlags);