Update PEAR Archive_Tar included in this package to 1.3.9.

Release date: 2012-02-27 14:29 UTC
Release state: stable

Changelog:

* Fix Bug #16759: No error thrown from missing PHP zlib functions [mrook]
* Fix Bug #18877: Incorrect handling of backslashes in filenames on
  Linux [mrook]
* Fix Bug #19085: Error while packaging [mrook]
* Fix Bug #19289: Invalid tar file generated [mrook]

Bump PKGREVISION.

(taca)