Fix '#if defined(ARMNN_POST_TFLITE_2_3)' in TfLiteParser Conv3D test.

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: I5c68b81a67fc2b5a33cf62753351440564bb868e
diff --git a/delegate/include/armnn_delegate.hpp b/delegate/include/armnn_delegate.hpp
index 8aaf255..79ab4bf 100644
--- a/delegate/include/armnn_delegate.hpp
+++ b/delegate/include/armnn_delegate.hpp
@@ -17,6 +17,10 @@
 #define ARMNN_POST_TFLITE_2_3
 #endif
 
+#if TF_MAJOR_VERSION > 2 || (TF_MAJOR_VERSION == 2 && TF_MINOR_VERSION > 4)
+#define ARMNN_POST_TFLITE_2_4
+#endif
+
 #if TF_MAJOR_VERSION > 2 || (TF_MAJOR_VERSION == 2 && TF_MINOR_VERSION > 5)
 #define ARMNN_POST_TFLITE_2_5
 #endif