Add 3.0 and 3.1 tags to the getting started guide.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158020 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/GettingStarted.html b/docs/GettingStarted.html
index 8c59e3e..ea835b3 100644
--- a/docs/GettingStarted.html
+++ b/docs/GettingStarted.html
@@ -748,6 +748,8 @@
 subdirectories of the '<tt>tags</tt>' directory:</p>
 
 <ul>
+<li>Release 3.1: <b>RELEASE_31/final</b></li>
+<li>Release 3.0: <b>RELEASE_30/final</b></li>
 <li>Release 2.9: <b>RELEASE_29/final</b></li>
 <li>Release 2.8: <b>RELEASE_28</b></li>
 <li>Release 2.7: <b>RELEASE_27</b></li>