pkg/repro: don't double-reverse log entries
pkg/repro: don't double-reverse log entries

For extractProgSingle() lastEntries are already reversed, so no need to
call reverseEntries().

Also for extractProgBisect() there's no point in reversing the entries,
as the idea is to try connecting multiple programs in chronological order.

xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller