[wwwdocs] Mention powerpc*-*-*spe* deprecation in gcc-8/changes.html

[Jakub Jelinek]

Hi!

The following patch mentions the deprecation of powerpc*spe*.
Ok for wwwdocs?

Index: changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-8/changes.html,v
retrieving revision 1.66
diff -u -p -r1.66 changes.html
--- changes.html	16 Apr 2018 13:39:03 -0000	1.66
+++ changes.html	18 Apr 2018 09:04:14 -0000
@@ -42,6 +42,14 @@ a work-in-progress.</h2>
     The non-standard C++0x <code>std::copy_exception</code> function was
     removed. <code>std::make_exception_ptr</code> should be used instead.
   </li>
+  <li><p>Support for the <code>powerpc*-*-*spe*</code> target ports which have
+    been recently unmaintained and untested in GCC has been declared
+    obsolete in GCC 8 as announced
+    <a href="https://gcc.gnu.org/ml/gcc/2018-04/msg00102.html">here</a>.
+    Unless there is activity to revive them, the
+    next release of GCC will have their sources permanently
+    <strong>removed</strong>.</p>
+  </li>
 </ul>
 
 
@@ -1162,7 +1170,8 @@ is now easier-to-read.</p>
 <ul>
   <li>
     The PowerPC SPE support is split off to a separate <code>powerpcspe</code>
-    port.  See the separate entry for that new port.
+    port.  The separate port is deprecated and might be removed in a future
+    release.
   </li>
   <li>
     The Paired Single support (as used on some PPC750 CPUs,
@@ -1181,8 +1190,6 @@ is now easier-to-read.</p>
   </li>
 </ul>
 
-<h3 id="powerpcspe">PowerPC SPE</h3>
-
 <!-- <h3 id="s390">S/390, System z, IBM z Systems</h3> -->
 
 <!-- <h3 id="riscv">RISC-V</h3> -->

	Jakub