Update a few more docs references to clang-cc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91178 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/libIndex.html b/docs/libIndex.html
index 5693de8..e722ee1 100644
--- a/docs/libIndex.html
+++ b/docs/libIndex.html
@@ -211,8 +211,8 @@
 You first get AST files out of <code>t1.c</code> and <code>t2.c</code>:
 
 <pre class="code_example">
-$ clang-cc -emit-pch t1.c -o t1.ast
-$ clang-cc -emit-pch t2.c -o t2.ast
+$ clang -emit-ast t1.c -o t1.ast
+$ clang -emit-ast t2.c -o t2.ast
 </pre>
 </p>