Enable warnings in setup.py, e.g., for tests.
Enable warnings in setup.py, e.g., for tests.

IljaZakharov/benchexec,ultimate-pa/benchexec,sosy-lab/benchexec,ultimate-pa/benchexec,martin-neuhaeusser/benchexec,sosy-lab/benchexec,dbeyer/benchexec,dbeyer/benchexec,IljaZakharov/benchexec,IljaZakharov/benchexec,sosy-lab/benchexec,IljaZakharov/benchexec,martin-neuhaeusser/benchexec,sosy-lab/benchexec,ultimate-pa/benchexec,sosy-lab/benchexec,martin-neuhaeusser/benchexec,sosy-lab/benchexec,dbeyer/benchexec,ultimate-pa/benchexec,dbeyer/benchexec,ultimate-pa/benchexec,ultimate-pa/benchexec,martin-neuhaeusser/benchexec