[libstdc++,doc] doc/xml/manual/debug.xml: Adjust link to ThreadSanitizer

[Gerald Pfeifer]

The site at code.google.com redirects to github now.

Applied.

Gerald

2017-02-19  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/debug.xml: Adjust link to ThreadSanitizer.

Index: doc/xml/manual/debug.xml
===================================================================
--- doc/xml/manual/debug.xml	(revision 245571)
+++ doc/xml/manual/debug.xml	(working copy)
@@ -234,7 +234,7 @@
   xlink:href="http://valgrind.org/docs/manual/hg-manual.html"> 
   Helgrind</link>, and
   <link xmlns:xlink="http://www.w3.org/1999/xlink" 
-  xlink:href="https://code.google.com/p/data-race-test/"> 
+  xlink:href="https://github.com/google/sanitizers"> 
   ThreadSanitizer</link> (this refers to ThreadSanitizer v1, not the
   new "tsan" feature built-in to GCC itself).
 </para>