[wwwdocs] readings.html -- two broken z/Architecture links

[Ulrich Weigand]

Hi Gerald,

> I've been getting
> 
>   "A possible equivalent for dz9zr002 was not found." (or similar)
> 
> for these two pages for a while.
> 
> If you have suitable links to cover these, please go ahead and add
> them; for the time being I committed the patch below.

I've committed the following patch to update those links.

Bye,
Ulrich

Index: readings.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/readings.html,v
retrieving revision 1.308
diff -u -r1.308 readings.html
--- readings.html	2 Dec 2018 10:55:41 -0000	1.308
+++ readings.html	3 Dec 2018 12:32:00 -0000
@@ -309,7 +309,10 @@
 
  <li>z/Architecture (S/390)
   <br />Manufacturer: IBM
+  <br /><a href="http://publibfp.dhe.ibm.com/epubs/pdf/dz9zr011.pdf">z/Architecture Principles of Operation</a>
+  <br /><a href="http://publibfp.dhe.ibm.com/epubs/pdf/dz9ar008.pdf">ESA/390 Principles of Operation</a>
   <br /><a href="http://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_zSeries.html">Linux for z Systems ABI</a>
+  <br /><a href="http://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_s390.html">Linux for S/390 ABI</a>
  </li>
 
 </ul>


-- 
  Dr. Ulrich Weigand
  GNU/Linux compilers and toolchain
  Ulrich.Weigand@de.ibm.com