Add Include to MPI_CHECK Makro Define for printf

The defined makro uses `printf` from `<cstdio>`.

For some reason the editor changed the file type (before: *ASCII text, with CRLF, LF line terminators*), so I decided to clean up the trailing white spaces, too...
Just append [?w=1](https://github.com/ComputationalRadiationPhysics/picongpu/pull/168/files?w=1) to the file diff to see the "real" changes.