Updating archivers/p5-Archive-Tar from 1.56 to 1.58

pkgsrc changes:
- "drop" explicit core dependency

Upstream changes:
* important changes in version 1.58 17/02/2010
- Apply a patch from toddr@null.net that addreses RT #54714

  Subject: $@ not cleaned up after eval

  This section of code seems to be trying to use future functionality
  not yet present in IO::Zlib (tell). I was chasing another bug and
  getting very confused by this population of $@. Could I request you
  cleanup $@ if you expect and/or don't care about failure from this eval?

(sno)