Suggest people run cvs up -P -d after checking out the tree so they don't

get empty directories

llvm-svn: 18543

Author: lattner

llvm/docs/GettingStarted.html

@@ -129,6 +129,7 @@
       <li><tt>cvs -z3 -d :pserver:[email protected]:/var/cvs/llvm 
           co llvm</tt></li>
       <li><tt>cd llvm</tt></li>
+      <li><tt>cvs up -P -d</tt></li>
     </ol></li>
   </ul></li>