gnulib's errno module was imported

[Joel Brobecker]

> Here's the updated patch.  I've now regtested it.
>
> Joel, WDYT?

Thanks, Pedro. That looks pretty good to me!

> gdb/
> 2014-11-14  Pedro Alves  <palves@redhat.com>
> 
> 	* charset.c [PHONY_ICONV && !EILSEQ] (EILSEQ): Don't define.
> 	[!PHONY_ICONV] (gdb_iconv): New function.
> 	[!PHONY_ICONV] (iconv): Redefine to gdb_iconv.

-- 
Joel