Update.
* iconvdata/8bit-gap.c: Correctly use __builtin_expect.
* iconvdata/ansi_x3.110.c: Likewise.
* iconvdata/big5.c: Likewise.
* iconvdata/euc-cn.c: Likewise.
* iconvdata/euc-jp.c: Likewise.
* iconvdata/euc-kr.c: Likewise.
* iconvdata/gb18030.c: Likewise.
* iconvdata/gbbig5.c: Likewise.
* iconvdata/gbgbk.c: Likewise.
* iconvdata/gbk.c: Likewise.
* iconvdata/ibm930.c: Likewise.
* iconvdata/ibm932.c: Likewise.
* iconvdata/ibm933.c: Likewise.
* iconvdata/ibm935.c: Likewise.
* iconvdata/ibm939.c: Likewise.
* iconvdata/ibm943.c: Likewise.
* iconvdata/iso-2022-cn.c: Likewise.
* iconvdata/iso-2022-kr.c: Likewise.
* iconvdata/iso646.c: Likewise.
* iconvdata/iso8859-1.c: Likewise.
* iconvdata/iso_6937-2.c: Likewise.
* iconvdata/iso_6937.c: Likewise.
* iconvdata/johab.c: Likewise.
* iconvdata/sjis.c: Likewise.
* iconvdata/t.61.c: Likewise.
* iconvdata/uhc.c: Likewise.
* iconvdata/unicode.c: Likewise.
* iconvdata/utf-16.c: Likewise.
* iconv/gconv_simple.c: Likewise. Convert assert() in real error
handling.