Document automake as a build dependency because we use aclocal


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11187 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/GettingStarted.html b/docs/GettingStarted.html
index 20705c6..816311b 100644
--- a/docs/GettingStarted.html
+++ b/docs/GettingStarted.html
@@ -264,12 +264,15 @@
 LLVM:</p>
 
 <ul>
-  <li><A href="http://www.gnu.org/software/autoconf">GNU Autoconf</A>
+  <li><A href="http://www.gnu.org/software/automake">GNU Automake</A></li>
+  <li><A href="http://www.gnu.org/software/autoconf">GNU Autoconf</A></li>
   <li><A href="http://savannah.gnu.org/projects/m4">GNU M4</A>
 
       <p>If you want to make changes to the configure scripts, you will need GNU
       autoconf (2.57 or higher), and consequently, GNU M4 (version 1.4 or
-      higher).</p></li>
+      higher). You will also need automake. Any old version of
+      automake from 1.4p5 on should work; we only use aclocal from that
+      package.</p></li>
 
   <li><A href="http://www.codesourcery.com/qm/qmtest">QMTest</A></li>
   <li><A href="http://www.python.org">Python</A>