* baseboards/androideabi.exp: Remove unnecessary quotes and braces
        around variable expansions.
        * baseboards/basic-sid.exp: Likewise.
        * baseboards/cris-sim.exp: Likewise.
        * baseboards/generic-sim.exp: Likewise.
        * baseboards/mcore-moto-sim.exp: Likewise.
        * baseboards/multi-sim.exp: Likewise.