IVGCVSW-3847 Add Support for GATHER

Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: I69dd78d47628355c207a450119b054b04581c729
diff --git a/1.3/HalPolicy.hpp b/1.3/HalPolicy.hpp
index b59710a..024d3ff 100644
--- a/1.3/HalPolicy.hpp
+++ b/1.3/HalPolicy.hpp
@@ -77,6 +77,8 @@
 
     static bool ConvertFullyConnected(const Operation& operation, const Model& model, ConversionData& data);
 
+    static bool ConvertGather(const Operation& operation, const Model& model, ConversionData& data);
+
     static bool ConvertGroupedConv2d(const Operation& operation, const Model& model, ConversionData& data);
 
     static bool ConvertHardSwish(const Operation& operation, const Model& model, ConversionData& data);