[v3] AM_ICONV to native-only

[Gabriel Dos Reis]

Mark Mitchell <mark@codesourcery.com> writes:

| Benjamin Kosnik wrote:
| 
| > However, the enclosed patch fixes the configure fail in all cases, by
| > moving AM_ICONV to native only.
| > 
| > tested x86/linux
| > tested x86/linux x powerpc-eabi (without --with-newlib)

Many thanks Benjamin for taking time to look into this; I know your
schedule is very tight.

-- Gaby