- Update p5-jcode to 2.13.

- Remove obsolete URL in DESCR.
- Add blank HOMEPAGE.

Changes are bellow (with my poor translation):

2.11-2.13

Fixed those bugs:

* wrong target string for replacement was specified in __z2h_jis().
* z2h() fail in processing a katakana which would never have a sonant mark
  but attached a sonant mark.

2.10-2.11

* jcode.pl works on perl with therad enabled.

japanese/p5-jcode/pkg/DESCR

@@ -1,14 +1,8 @@
-``jcode.pl-2.x'' is a perl library for japanese character code conversion.
-It supports translation of each JIS, EUC, Shift JIS texts, and automatically
-recognizes the encode-method of the target text files.
+jcode.pl is Perl library for Japanese character code conversion.
+It supports translation of each JIS, EUC, Shift JIS texts, and
+automatically recognizes the encode-method of the target text files.
 
-To use this, your script should load this library as
-
-+ require "jcode.pl";
-or
-+ require('jcode.pl');
-
-# See also:
-# http://www.bekkoame.or.jp/~syunji/perl/perl_j.html
-# http://www.bekkoame.or.jp/~syunji/perl/jcode20.txt
-# (both pages are written in Japanese)
+Document is in jcode.pl itself as comment.
+And jcode.pl-history file (in Japanese) might help you:
+	ftp://ftp.iij.ad.jp/pub/IIJ/dist/utashiro/perl/jcode.pl-history
+	ftp://ftp.sra.co.jp/pub/lang/perl/sra-scripts/jcode.pl-history