package/libs/libiconv: function names

package/libs/libiconv: function names

Currently libiconv-stub and libiconv-full use different names
for functions iconv, iconv_open, and iconv_close.

This may lead to failures when building modules, e.g. with
apr-util when NLS is not activated.

The two modules libiconv-stub and libiconv-full should be
interchangeable, so we need the same function names.

cf.
http://git.savannah.gnu.org/cgit/libiconv.git/tree/include/iconv.h.in

After applying this patch execute

	make distclean

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@48301 3c298f89-4303-0410-b956-a3cf2f4a3e73