Add more bison versions, thanks to Vladimir

llvm-svn: 24169
diff --git a/llvm/docs/GettingStarted.html b/llvm/docs/GettingStarted.html
index 5d568f6..f493c5d 100644
--- a/llvm/docs/GettingStarted.html
+++ b/llvm/docs/GettingStarted.html
@@ -362,7 +362,7 @@
 
     <tr>
       <td><a href="http://www.gnu.org/software/bison/bison.html">Bison</a></td>
-      <td>1.28, 1.35, or 2.0</td>
+      <td>1.28, 1.35, 1.75, or 2.0 (not 1.85)</td>
       <td>YACC compiler</td>
     </tr>