running autoreconf -fvi in tarball results in old iconv.m4

This manifests itself by ./configure output looking like:

  iconv:              

The problem is reproduced in commit 1875b80b and worked around by using

AUTOPOINT=true autoreconf -fvi

in commit 077dbf68.

For anyone wanting to use 'autoreconf -fvi' and running into problems, please use the AUTOPOINT=true workaround until someone comes up with a proper fix for this problem.