Add Objective-C++ bits

[Mike Stump <mrs at apple dot com>]

Don't get your hopes up, this is isn't complete, yet.... just a baby  
step in the right direction.

The general plan is:

    default to off, no one should notice this stuff
    add the easy bits (this patch set)
    add Makefile/configure bits
    add backend bits
    add cp bits
    add dejagnu bits
    add doc bits

The ordering above isn't hard, let me know if you like other orders.   
I think almost all the patches past this initial set will be sent for  
review by the normal maintainers of the areas affected, so that we  
have an opportunity to address any concerns before things go in.  For  
the bits already in, let me know if there is anything there that  
needs attention.  I did a build with --enable-languages=all to try  
and ensure that even those people don't get hit with this.  It seemed  
to avoid building any of this for me, let me know if someone finds a  
way to get a build to fail because of this (other than --enable- 
languages=obj-c+++ of course).

Concerns, questions, comments?

Attachment: objcp-1.diffs.txt
Description: Text document