IVGCVSW-3400 Add missing virtual destructors

 * Added missing virtual destructors to recently added profiling
   interface classes

Change-Id: Id2c4b3bb22ef233b26723d3e578477c59018fbda
Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
diff --git a/src/profiling/IBufferWrapper.hpp b/src/profiling/IBufferWrapper.hpp
index 5128521..9c38ab1 100644
--- a/src/profiling/IBufferWrapper.hpp
+++ b/src/profiling/IBufferWrapper.hpp
@@ -14,6 +14,8 @@
 class IBufferWrapper
 {
 public:
+    virtual ~IBufferWrapper() {}
+
     virtual unsigned char* Reserve(unsigned int requestedSize, unsigned int& reservedSize) = 0;
 
     virtual void Commit(unsigned int size) = 0;
@@ -25,4 +27,4 @@
 
 } // namespace profiling
 
-} // namespace armnn
\ No newline at end of file
+} // namespace armnn