message: Add clean-cpp to clean targets
diff: @@ -237,5 +237,5 @@ clean-libote:
  @rm -rf $(builddir)/libOTe/
  @rm -f compile-libote
  -clean: clean-libote clean-openssl clean-boost clean-emp clean-otextension-bristol clean-ntl clean-install clean-tests
  +clean: clean-libote clean-openssl clean-boost clean-emp clean-otextension-bristol clean-ntl clean-install clean-tests clean-cpp
  