IVGCVSW-4734 Add an Attribute label guid to the relationship message to reduce traffic

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Change-Id: Ia55c52c12fe3d30eb47bc42c932a33c620dc9197
diff --git a/src/profiling/LabelsAndEventClasses.hpp b/src/profiling/LabelsAndEventClasses.hpp
index fa12549..d79870f 100644
--- a/src/profiling/LabelsAndEventClasses.hpp
+++ b/src/profiling/LabelsAndEventClasses.hpp
@@ -20,10 +20,12 @@
 {
 public:
     // Labels (string value + GUID)
+    ARMNN_DLLEXPORT static std::string EMPTY_LABEL;
     ARMNN_DLLEXPORT static std::string NAME_LABEL;
     ARMNN_DLLEXPORT static std::string TYPE_LABEL;
     ARMNN_DLLEXPORT static std::string INDEX_LABEL;
     ARMNN_DLLEXPORT static std::string BACKENDID_LABEL;
+    ARMNN_DLLEXPORT static ProfilingStaticGuid EMPTY_GUID;
     ARMNN_DLLEXPORT static ProfilingStaticGuid NAME_GUID;
     ARMNN_DLLEXPORT static ProfilingStaticGuid TYPE_GUID;
     ARMNN_DLLEXPORT static ProfilingStaticGuid INDEX_GUID;