Align it with the rest of our cmake support files. Adding it to configure as
well so the cmake file gets generate from the cmake.in
Without this I had distcheck failing with a missing target for it.
cmakeconfig/EoConfigVersion.cmake:cmakeconfig/EFLConfigVersion.cmake.in
cmakeconfig/EolianConfig.cmake
cmakeconfig/EolianConfigVersion.cmake:cmakeconfig/EFLConfigVersion.cmake.in
+cmakeconfig/EolianHelper.cmake
cmakeconfig/EolianCxxConfig.cmake
cmakeconfig/EolianCxxConfigVersion.cmake:cmakeconfig/EFLConfigVersion.cmake.in
cmakeconfig/EinaCxxConfig.cmake