lib/util/charset: remove charset module loading

lib/util/charset: remove charset module loading

Now that the 'table' modules are gone, there is no reason for there to
be charset modules at all.  This builds the macosxfs and weird modules
into the binary at the appropriate times, and changes the tests to
test instead the difference between the remaining internal handlers
and iconv().

Andrew Bartlett

Autobuild-User: Andrew Bartlett <abartlet@samba.org>
Autobuild-Date: Tue Sep 20 06:27:06 CEST 2011 on sn-devel-104