Log Message:
Update dd_rescue to 1.14 and add support for DESTDIR.

Changes from 1.12:

The current version is 1.14, released 2007-08-28.
In version 1.14, a bug is fixed that could lead to a target file not having the
correct size when copied in sparse (-a) mode.
In version 1.13, a bug with read-errors and non-seekable output has been fixed.