[PATCH] Update wwwdocs for --with-advance-toolchain=at

[Michael Meissner <meissner@linux.vnet.ibm.com>]

I installed the following patch on wwwdocs to document the
--with-advance-toolchain=<at> option I added in June:

2015-08-25  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* changes.html (PowerPC options): Document new configure option
	--with-advance-toolchain=at.

Index: htdocs/gcc-6/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-6/changes.html,v
retrieving revision 1.21
diff -p -c -r1.21 changes.html
*** htdocs/gcc-6/changes.html	13 Aug 2015 12:32:16 -0000	1.21
--- htdocs/gcc-6/changes.html	25 Aug 2015 16:38:13 -0000
*************** enum {
*** 182,187 ****
--- 182,195 ----
  <!-- <h3 id="nds32">NDS32</h3> -->
  
  <!-- <h3 id="powerpc">PowerPC / PowerPC64 / RS6000</h3> -->
+   <ul>
+     <li><p>A new configuration option -<code>--with-advance-toolchain=at</code>
+     was added for PowerPC 64-bit Linux systems to use the header files, library
+     files, and the dynamic linker from a specific Advance Toolchain release
+     instead of the default versions that are provided by the Linux
+     distribution.  In general, this option is intended for the developers of
+     GCC, and it is not intended for general use.
+   </ul>
  
  <!-- <h3 id="rx">RX</h3> -->
  

-- 
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.vnet.ibm.com, phone: +1 (978) 899-4797