Add missing files for test execution to source archive.
Add missing files for test execution to source archive.

bjowac/impara-benchexec,IljaZakharov/benchexec,ultimate-pa/benchexec,sosy-lab/benchexec,cheshire/benchexec,IljaZakharov/benchexec,cheshire/benchexec,michkot/benchexec,dbeyer/benchexec,dbeyer/benchexec,sosy-lab/benchexec,sosy-lab/benchexec,ultimate-pa/benchexec,bjowac/impara-benchexec,bjowac/impara-benchexec,ultimate-pa/benchexec,cheshire/benchexec,ultimate-pa/benchexec,IljaZakharov/benchexec,sosy-lab/benchexec,ultimate-pa/benchexec,dbeyer/benchexec,ultimate-pa/benchexec,dbeyer/benchexec,sosy-lab/benchexec,martin-neuhaeusser/benchexec,IljaZakharov/benchexec,martin-neuhaeusser/benchexec,sosy-lab/benchexec,martin-neuhaeusser/benchexec,michkot/benchexec,martin-neuhaeusser/benchexec,michkot/benchexec