We half-enabled the Mac OS X packaging stuff, which meant that we

We half-enabled the Mac OS X packaging stuff, which meant that we
weren't including in the tarball stuff the packaging/macosx/Makefile.in
file that that the configure script from the tarball was trying to
expand.  Add macosx to the list of directories in packaging/Makefile.am,
and update the comment in packaging/macosx/Makefile.am to reflect the
enabling of the OS X packaging stuff.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@25449 f5534014-38df-0310-8fa8-9805f1628bb7