lang/pear: update Archive_Tar to 1.4.10

Update Archive_Tar pear package to 1.4.10.

Bump PKGREVISION.

Archive_Tar 1.4.10 (2020-09-15 10:16 UTC)

Changelog:

* Fix block padding when the file buffer length is a multiple of 512 and
  smaller than Archive_Tar buffer length
* Don't try to copy username/groupname in chroot jail

(taca)