Small typo in iconv.m4

[Hafiz Abid Qadeer]

Hi All,
Attached config/ patch was approved and committed in gcc repo. Ok to
commit it in the binutils-gdb repo?

2018-11-09  Hafiz Abid Qadeer  <abidh@codesourcery.com>

	* config/iconv.m4 (AM_ICONV_LINK): Don't overwrite CPPFLAGS.
	Append $INCICONV to it.
	* gdb/configure: Regenerate.
	* binutils/configure: Likewise.
	* intl/configure: Likewise.

Thanks,
-- 
Hafiz Abid Qadeer
Mentor Embedded/CodeSourcery
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