[PATCH, wwwdocs] Update AArch64 entry in readings.html

[Richard Earnshaw (lists)]

This patch tweaks the wording in the entry for AArch64 and also adds a
Manufacturer: entry similar to that for ARM.

Committed.

R.
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Index: readings.html
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RCS file: /cvs/gcc/wwwdocs/htdocs/readings.html,v
retrieving revision 1.261
diff -u -r1.261 readings.html
--- readings.html	22 Feb 2017 11:22:44 -0000	1.261
+++ readings.html	22 Feb 2017 11:43:38 -0000
@@ -60,9 +60,10 @@
 
 <ul>
  <li>AArch64
-  <br />The 64-bit execution state introduced in the ARMv8-A architecture profile.
-  <br /><a href="http://infocenter.arm.com/help/index.jsp">
-	ARM Documentation</a>
+  <br />The 64-bit execution state of the ARM Architecture, first introduced
+  by the ARMv8-A architecture.
+  <br />Manufacturer: Various, by license from ARM.
+  <br /><a href="http://infocenter.arm.com/help/index.jsp">ARM Documentation</a>
  </li>
 
  <li>andes (nds32)