Forward port apr-iconv changes from API_0_9_BRANCH

Add in api_version.{c|h} to allow iconv to have a version number, too.
Take another pass at a build system and have it *really* use exports.


git-svn-id: https://svn.apache.org/repos/asf/apr/apr-iconv/trunk@57726 13f79535-47bb-0310-9956-ffa450edef68
10 files changed