IVGCVSW-7618 Implement UnidirectionalSequenceLstm operator for Opaque Delegate

 * Intermediate tensors aren't accessible through the new
   Opaque interface yet, so we have to cast to TfLiteNode for now.

Signed-off-by: Matthew Sloyan <matthew.sloyan@arm.com>
Change-Id: Ifd91131e5d5ff6cc057b80729fea9afa68ed240b
diff --git a/delegate/opaque/CMakeLists.txt b/delegate/opaque/CMakeLists.txt
index a82b75ae..d7aed37 100644
--- a/delegate/opaque/CMakeLists.txt
+++ b/delegate/opaque/CMakeLists.txt
@@ -40,6 +40,7 @@
         src/Split.hpp
         src/StridedSlice.hpp
         src/Transpose.hpp
+        src/UnidirectionalSequenceLstm.hpp
         src/Unpack.hpp)
 
 add_library(armnnOpaqueDelegateObject OBJECT ${armnnOpaqueDelegateObject_sources})