make ishiiruka failure videoBackends

In file included from /mnt/50GB_Drive/jenkins/workspace/Ishiiruka/Ishiiruka/Source/Core/VideoBackends/Software/SWRenderer.h:12:0,
                 from /mnt/50GB_Drive/jenkins/workspace/Ishiiruka/Ishiiruka/Source/Core/VideoBackends/Software/DebugUtil.cpp:13:
/mnt/50GB_Drive/jenkins/workspace/Ishiiruka/Ishiiruka/Source/Core/VideoCommon/RenderBase.h:56:15: error:   since ‘virtual void Renderer::Shutdown()’ declared in base class
  virtual void Shutdown() {}
               ^
Source/Core/VideoBackends/Software/CMakeFiles/videosoftware.dir/build.make:86: recipe for target 'Source/Core/VideoBackends/Software/CMakeFiles/videosoftware.dir/DebugUtil.cpp.o' failed
make[2]: *** [Source/Core/VideoBackends/Software/CMakeFiles/videosoftware.dir/DebugUtil.cpp.o] Error 1
CMakeFiles/Makefile2:1584: recipe for target 'Source/Core/VideoBackends/Software/CMakeFiles/videosoftware.dir/all' failed