Rename --hide-dir to --hidden-dir for consistency.
Rename --hide-dir to --hidden-dir for consistency.

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