Log Message:
Update to 0.5.13 and set TEST_TARGET.
Changes:

* Version 0.5.13 (released 2005-01-29)

** The code to convert data between character encodings have been cleaned up.
The stringprep_convert function has been added to gnulib, under the
name iconv_string, and is now used by libidn.  This should not have
any user-visible consequences, though.

** It is now possible to bootstrap with unmodified Automake installations.

** Italian translation added, thanks to Marco Colombo.

** Swedish translation updated.