RIOT-OS/RIOT — pull request #1788 by BytesGalore (2014-10-10 06:13:22+00:00)
Title: c++: tests/unittests: add extern C in header files

This PR adds `extern "C"` for the header files in `./RIOT/test/unittests` folder.
`./RIOT/test` does not contain any header

I left out `./unittests/embUnit/embUnit.h` as it only collects all other headers form `embUnit`