Fix 01-driver.t Darwin mocks for 691d510

After reading #65, I realized I didn't compare my mock sizes
either. I found that the mocks in 691d510 were also
significantly smaller. Using

    export WD_MOCKING_RECORD=1 && perl -I ./lib/ -w /opt/gempesaw-selenium-remote-driver/t/01-driver.t

instead of simply invoking `dzil test` has generated mocks that are of
the larger, expected size, and they also pass

    export WD_MOCKING_RECORD=0 && dzil test

whereas the old mocks were not passing.