tools/hg: seems like hg is up to v3.2

Author: tantek

tools/hg.txt

@@ -24,7 +24,7 @@ hg --version
 You should see something like:
 
 <code>
-Mercurial Distributed SCM (version 2.9)
+Mercurial Distributed SCM (version 3.2)
 (see http://mercurial.selenic.com for more information)
 </code>