Update CJK converters and their generating scripts

scripts/euckr_gen.sh

 #!/bin/sh
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # References:
 #   https://encoding.spec.whatwg.org/#euc-kr
 
 # This script downloads the following file.
 #   https://encoding.spec.whatwg.org/index-euc-kr.txt
 
 function preamble {
 cat <<PREAMBLE
 # ***************************************************************************
 # *
 # *   Copyright (C) 1995-2015, International Business Machines
 # *   Corporation and others.  All Rights Reserved.
 # *
 # *   Generated per the algorithm for EUC-KR
 # *   described at http://encoding.spec.whatwg.org/#euc-kr
 # *
 # ***************************************************************************
 <code_set_name>               "euc-kr-html"
 <mb_cur_max>                  2
 <mb_cur_min>                  1
 <uconv_class>                 "MBCS"
 <subchar>                     \x3F
 <icu:charsetFamily>           "ASCII"
 
-<icu:state>                  0-80, 81-fe:1, ff
+# 81-fe in states 2 and 3 can be tigher and a1-fe, but
+# to be compliant to HTML5 spec, it should be 81-fe.
+<icu:state>                  0-7f, 81-c5:1, c6:2, c7-fe:3
 <icu:state>                  41-5a, 61-7a, 81-fe
+<icu:state>                  41-52, 81-fe
+<icu:state>                  81-fe
 
 CHARMAP
 PREAMBLE
 }
 
 function ascii {
   for i in $(seq 0 127)
   do
     printf '<U%04X> \\x%02X |0\n' $i $i
   done
@@ skipping 11 matching lines @@
          printf ("<U%4s> \\x%02X\\x%02X |%d\n", ucs,\
                  lead,  trail, tag);\
        }' \
   index-euc-kr.txt
 }
 
 function unsorted_table {
   euckr
 }
 
-curl -o index-euc-kr.txt https://encoding.spec.whatwg.org/index-euc-kr.txt
+wget -N -r -nd https://encoding.spec.whatwg.org/index-euc-kr.txt
 preamble
 ascii
 unsorted_table | sort -k1  | uniq
 echo 'END CHARMAP'