[wwwdocs] Objective-C/Darwin related updates for the GCC 4.6 release notes

[Gerald Pfeifer]

Going through some older mails (as some may have noticed), I found
this patch which Iain was had done, and which I had reviewed, but
which somehow did not make it in.

Applied now, with some fuzzing manually adjusted.

Gerald

--- changes.html.orig	2012-10-03 07:02:42.198917592 -1000
+++ changes.html	2013-01-06 18:54:44.729487237 -1000
@@ -716,8 +716,7 @@
     <li>As a result of these enhancements, GCC can now be used to
     build Objective-C and Objective-C++ software that uses Foundation
     and other important system frameworks with the NeXT runtime on
-    Darwin 9 and Darwin 10 (Mac OS X 10.5 and 10.6).  Currently this is for
-    m32 code only.</li>
+    Darwin 9 and Darwin 10 (OSX 10.5 and 10.6).</li>
 
     <li>Many bugs in the compiler have been fixed in this release; in
     particular, LTO can now be used when compiling Objective-C and
@@ -1013,6 +1012,14 @@
 	allocators have been re-written to make more use of
 	<code>.zerofill</code> sections.  For non-debug code, this can
 	reduce object file size significantly.</li>
+	<li>Objective-C family 64-bit support (NeXT ABI 2).<br />
+	Initial support has been added to support 64-bit Objective-C code
+	using the Darwin/OS X native (NeXT) runtime.  ABI version 2 will be
+	selected automatically when 64-bit code is built.</li>
+	<li>Objective-C family 32-bit ABI 1.<br />
+	For 32-bit code ABI 1 is also now also allowed.  At present it must
+	be selected manually using <code>-fobjc-abi-version=1</code> where
+	applicable - i.e. on Darwin 9/10 (OS X 10.5/10.6).</li>
        </ul></li>
       <li>x86 Architecture 
        <ul>