xfsdump: add new recipe

The xfsdump package contains xfsdump, xfsrestore and a
number of other utilities for administering XFS filesystems.
xfsdump examines files in a filesystem, determines which
need to be backed up, and copies those files to a
specified disk, tape or other storage medium.

Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>