CTest support for QEMU/Renode.

* Example usage:
    mkdir build
    cd build
    cmake -GNinja ../
    cmake --build . --target AllTests
    ctest --verbose # Optional, run with ctest
* Example 2
    m test_springbok

Change-Id: I0eb8a162a3271af8e26aea1bacf1069a6566d6aa