Linking an empty CppunitTest against smoketest Library does not work,
the linker complains aboutunresolved external symbol DllMainCRTstartup
or something like that; building a static library has the same result;
so just build the cxx file twice via a dummy smoketest_too.cxx.

Change-Id: I11a29d4ec134f67a7de896ff8c669ed5b47782a7