Resolve a validation layer warnings on destruction order of Image/Buffer and bound DeviceMemory. (#1636)

RAII_Samples/07_InitUniformBuffer/07_InitUniformBuffer.cpp

@@ -78,6 +78,10 @@ int main( int /*argc*/, char ** /*argv*/ )
 
     uniformDataBuffer.bindMemory( *uniformDataMemory, 0 );
 
+    // while all vk::raii objects are automatically destroyed on scope leave, the Buffer should to be destroyed before the bound DeviceMemory
+    // but the standard destruction order would destroy the DeviceMemory before the Buffer, so destroy the Buffer here
+    uniformDataBuffer.clear();
+
     /* VULKAN_HPP_KEY_END */
   }
   catch ( vk::SystemError & err )